I first noticed this about two months ago at this point but for whatever reason rumble doesn't really work with Resident Evil 2 or it's so very weak that it really depends on the controller if it even triggers. I've noticed this issue on both Android and Linux, with different gamepads. Rumble in other games like Ocarina of Time or with the controller test ROM works fine, so it's just something about Resident Evil 2 that doesn't work? For a quick test, it should trigger when you select a character on the new game screen, or whenever you're attacked by a zombie (confirmed on actual hardware).