If you ignore the warnings and search for these files, you will encounter one of three things:
If you want to use the PPSSPP emulator, you can play the prequel to the first Red Dead Redemption .
If you own the game on a PlayStation 4 or 5, you can stream it from your console to your mobile device using the official Remote Play app. Steam Link:
Some developers create small, 2D, or top-down fan games inspired by RDR2 that can run on mobile, but these are not the actual Rockstar game.