LOW FPS on mobile phone, need help.

Hey, I've Redmi Note 9 pro(6 GB RAM) and the max FPS I get on mobile is 42 FPS, it's even lower on 4GB and 2GB mobile phones.
Please take a look at the stats and tell what is causing this LOW FPS.

 

The best way to figure out the problem is to profile your application on your target hardware.

https://docs.unity3d.com/Manual/profiler-profiling-applications.html

 

Hey, I'm aware of the profiler, what I don't know is what stat is too much for the system to handle, for example I don't know how much verts or tris or batch calls should I have.

 

You're making an assumption that it's any of those things. Check the profiler and see if rendering is your bottleneck or something else.