Fixing uplifted magnetic heatbed surface When trying calibration prints, I printed something with 240 celcius on magnetic heatbed and when removing the object, because it sticked very hard on surface, it uplifted surface of magnetic bed.

So when printing first layers, nozzle touches the bed when it's passing on that points.

Is there any way to fix this? I'm thinking about ironing the magnetic bed but not sure.
The Ender 3 Pro bed looks like a sheet of steel with a stick-on plastic sheet.  If the steel plate is bent, you would probably be happier to buy another one.  If the plastic film has lifted off the bed, you might be happier to buy a new plate, although there are sheets of film with adhesive available.

If you are printing small objects, you can plate them other than in the center.

If the problem is that the central bump screws up auto-leveling, try ironing while you are waiting for the new one to arrive.

I looked on the Creality site but did not find listings for spare parts.  You may need to be a customer to see that part of the catalog.

Ironing it might work.  The adhesive is probably good for 110 C.  I say that because the specs for the Prusa3D bed are similar.  I looked up the 3M product used for the PEI surface and found that the adhesive was the limiting factor at 110 C.  The PEI was good for a higher temperature.  If ironing doesn't work, buy another one.  If ironing does, come back and answer your own question so the information is preserved.