Not every Unity game works perfectly. Check the JoiPlay Reddit or Discord for community-tested titles.
Utilize your device’s native gaming mode (like Samsung Game Booster or Xiaomi Game Turbo) to allocate maximum RAM and CPU power to JoiPlay. Customizing On-Screen Controls unity plugin for joiplay
Here’s a useful, concise guide for using (an Android app that runs RPG Maker and some Unity games). Not every Unity game works perfectly