Bishop and queen endgame from a computer chess game [FEN &quot;8/6pk/p4b1p/2B5/P3q2P/6P1/5P2/3Q2K1 w - - 0 1&quot;]

1. Ba7 (1. h5)

This position happened in TCEC Season 15 Superfinal Stockfish vs Leela. In the game Stockfish played Ba7 and the game steered toward a draw , though in the end Stockfish won because a late Leela blunder. Can Stockfish win by force this ending? Crystal (7 man tablebases Stockfish , albeit with a slightly lesser depth) suggested h5. I am unable to analyze it with the modest instrument I have. May someone telling me if it is winnable by White , and , in case , with what move, please?
Queen endings are among the most difficult.
We usually say &quot;win by force&quot; when there's a definite winning line. You're asking if White is certain to win, not at all certain.
A human player would look first to winning the  queenside pawn and then with an advantage on both wings, many chances to win. But while that pawn sits on a black square White can't coordinate force against it.
And I don't think White can try for a kingside initiative while the a-pawn has to be tended to. White doesn't want to move it to a5, where it's fixed and can be coordinated against, and it's always exposed to threats on a4.