Mobile Performance Issues

Hey everyone!

I am kinda new to Unity and just completed the first level on my mobile game. When I run the game on my mobile device (I just used the apk file that I got from the build), I had huge performance issues. I was not able to play the game. I tried to use Profiler, but according to online videos and etc., the profiler scene seemed to me just fine.

As you can see in the below screenshot, it says around 250 fps (it runs without any problem on Editor). But when I try to run it on mobile, it's not even 60fps (I am literally not able to make any move).

Could you please help me with understanding the issue?