Yes, Jesus is the Rock. . Isn’t that wonderful? There is a wonderful song about that. We use to sing it a lot in the different churches I have attended over my 71 years. “On Christ, the solid Rock I stand, all other is sinking sand....”
Jesus is indeed the "rock of ages"....but, He Himself designated Peter to be the rock upon which He would build His church....otherwise, what was the point of renaming Simon Bar-Jona...a perfectly good name.