Why is it saying my games are corrupted

First, try to insert the same game disc into another PS4(I think a PS5 should also work)and see if that works.

IF IT DOES: Clearly your console has something wrong with it. Most of the time it should be the disc drive.

IF IT DOESN'T: It's obvious now that the game has something wrong with it. Maybe it's gone for good, or maybe it just needs some cleaning. Try cleaning it at first and see if that works. If it does, good! If it doesn't, just buy another disc.

If you don't have another ps4 or your friend or anybody that you know doesn't, try cleaning the disc. If that doesn't work, Show your PS4 to a technician. If the PS4 has no problems, buy a new game.