Hey!
Sorry to hear you are having FPS problems. Unfortunately, the current version of the game is fairly intensive compared to similar game due to various systems in play in the background. From internal testing the game should run fine via joiplay on recent flagship android phones from around 2020 and newer. Pixel 5, 6, 6a, 7, and s20, s21 (with snapdragon) all seem to run the game fine.
We hope to optimize the game for lower-end hardware in future versions. So stay tuned!