Ping is something different from what you mean, I suppose you mean fps (frames per second). Ping is the latency you have when you send a signal to a server (which TEE does not have).
In another case, your phone is probably not powerful enough to keep the game stable constantly.
It is recommended to use a laptop or a computer, or a phone that has enough space and RAM and a mid/high-end processor.
In the future, it might be optimized, but it is not the current priority of the creator.