Does Catholic Church acknowledge St. Paul the Apostle as consecrated Bishop during Apostolic times? St. Paul the Apostles admitted that Christ did not sent him to baptize but to preach the Gospel.

17For Christ did not send me to baptize, but to preach the gospel, not with eloquent words of wisdom, lest the cross of Christ be emptied of its power. (1Corinthian1:17)
In the Catholic Church, a bishop is an ordained minister who holds the fullness of the sacrament of holy orders and is responsible for teaching doctrine, governing Catholics in his jurisdiction, sanctifying the world and representing the Church. Catholics trace the origins of the office of bishop to the apostles, who it is believed were endowed with a special charism by the Holy Spirit at Pentecost. Catholics believe this special charism has been transmitted through an unbroken succession of bishops by the laying on of hands in the sacrament of holy orders. - Bishop in the Catholic Church

In Catholicism the priest has the faculties to administer Sacraments of Baptism, Penance and Matrimony but the Sacrament of Confirmation is only for the consecrated  Bishop.
If St. Paul was not sent to baptize although the scriptures showed St. Paul had the faculties to baptize if he wants too. It would mean St. Paul lacks the faculties to confer the Sacrament of Confirmation unlike the rest of the Apostles who were present at the Upper Room and had received the Holy Spirit.

1299 In the Roman Rite the bishop extends his hands over the whole group of the confirmands. Since the time of the apostles this gesture has signified the gift of the Spirit. The bishop invokes the outpouring of the Spirit in these words:
All-powerful God, Father of our Lord Jesus Christ,
by water and the Holy Spirit
you freed your sons and daughters from sin
and gave them new life.
Send your Holy Spirit upon them
to be their helper and guide.
Give them the spirit of wisdom and understanding,
the spirit of right judgment and courage,
the spirit of knowledge and reverence.
Fill them with the spirit of wonder and awe in your presence.
We ask this through Christ our Lord.113

Does Catholic Church acknowledge St. Paul the Apostle as a consecrated bishop during Apostolic times?
Does Catholic Church acknowledge St. Paul the Apostle as consecrated Bishop during Apostolic times?

The short answer is yes.

The Catholic Encyclopedia states that St. Paul actually consecrated Timothy a Bishop by St. Paul himself thus St. Paul had to have been a bishop.


  From Scripture we learn that the Apostles appointed others by an external rite (imposition of hands), conferring inward grace. The fact that grace is ascribed immediately to the external rite, shows that Christ must have thus ordained. The fact that cheirontonein, cheirotonia, which meant electing by show of hands, had acquired the technical meaning of ordination by imposition of hands before the middle of the third century, shows that appointment to the various orders was made by that external rite. We read of the deacons, how the Apostles "praying, imposed hands upon them" (Acts 6:6). In 2 Timothy 1:6 St. Paul reminds Timothy that he was made a bishop by the imposition of St. Paul's hands (cf. 1 Timothy 4:4), and Timothy is exhorted to appoint presbyters by the same rite (1 Timothy 5:22; cf. Acts 13:3; 14:22). In the Third Clementine Homily (73), we read of the appointment of Zachæus as bishop by the imposition of Peter's hands. The word is used in its technical meaning by Clement of Alexandria (Stromata VI.13, 106; cf. Apostolic Consitutions II.32). "A priest lays on hands, but does not ordain" (cheirothetei ou cheirotonei) "Didasc. Syr.", IV; III, 10, 11, 20; Cornelius, "Ad Fabianum" in Eusebius, Church History VI.43. 
  
  The ordinary minister of the sacrament [of holy orders] is the bishop, who alone has this power in virtue of his ordination. Holy Scripture attributed the power to the Apostles and their successors (Acts 6:6; 16:22; 1 Timothy 5:22; 2 Timothy 1:6; Titus 1:5), and the Fathers and councils ascribe the power to the bishop exclusively. First Council of Nicaea (Canon 4) and Apostolic Constitutions VIII.28 — "A bishop lays on hands, ordains. . .a presbyter lays on hands, but does not ordain." - Holy Orders


To see more that the  Church believes that St. Paul was a bishop can be seen in the Apostolic Constitutions (Book VII) that St. Paul is believed to have ordained several men.


  Who Were They that the Holy Apostles Sent and Ordained?
  
  XLVI. Now concerning those bishops which have been ordained in our lifetime, we let you know that they are these:— James the bishop of Jerusalem, the brother of our Lord; upon whose death the second was Simeon the son of Cleopas; after whom the third was Judas the son of James. Of Cæsarea of Palestine, the first was Zacchæus, who was once a publican; after whom was Cornelius, and the third Theophilus. Of Antioch, Euodius, ordained by me Peter; and Ignatius by Paul. Of Alexandria, Annianus was the first, ordained by Mark the evangelist; the second Avilius by Luke, who was also an evangelist. Of the church of Rome, Linus the son of Claudia was the first, ordained by Paul; 2 Timothy 4:21 and Clemens, after Linus' death, the second, ordained by me Peter. Of Ephesus, Timotheus, ordained by Paul; and John, by me John. Of Smyrna, Aristo the first; after whom Stratæas the son of Lois; 2 Timothy 1:5 and the third Aristo. Of Pergamus, Gaius. Of Philadelphia, Demetrius, by me. Of Cenchrea, Lucius, by Paul. Of Crete, Titus. Of Athens, Dionysius. Of Tripoli in Phœnicia, Marathones. Of Laodicea in Phrygia, Archippus. Of Colossæ, Philemon. Of Borea in Macedonia, Onesimus, once the servant of Philemon. Of the churches of Galatia, Crescens. Of the parishes of Asia, Aquila and Nicetas. Of the church of Æginæ, Crispus. These are the bishops who are entrusted by us with the parishes in the Lord; whose doctrine keep always in mind, and observe our words. And may the Lord be with you now, and to endless ages, as Himself said to us when He was about to be taken up to His own God and Father. For says He, Lo, I am with you all the days, until the end of the world. Amen. Matthew 28:20 - Enumeration Ordained by Apostles