Turns out... it was an update file I hadn't downloaded, everyone

Android Vulkan Rendering Remember to switch the setting after downloading. See if Ping FPS is 60 or above for smoother gameplay. If not, switch back. If it's not compatible, you can long-press the app, clear the first data, and re-download without downloading the Vulkan rendering file. PS: Not recommended to download and use on Android 11. Probably only for core versions and flagship phones 🤣 (After setting on Relame XT, it's not much smoother, which is a shame. Luckily, I'm getting a new phone soon.)