My game works fine in pc but when i play in mobile it looks like 15fps. But 60fps (Unity) - unity3d

I created a online mobile game with photon (unity) . It was working successfully. But something happened and now in its look like low fps. But i checked it and fps counter showed me 60fps. I tried nearly everything for it but i couldn't fix it. (Yes i checked camera update)

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camera black on an android camera (unity)

So, for whatever reason the camera on my unity project build on android is black. I don't believe this is a coding issue considering the fact that it works perfectly fine on my pc with a normal webcam. I'm using unity 2021.1.0f1.
I figured it out. Turns out all I had to do was go into settings and turn on the camera permissions/restart the app. Even though I already allowed it in the app, guess it caused an error when a camera wasn't detected straight away.

How to reduce drawcalls in unity?

I'm a beginner developer in Unity 3D and I'm working on a mobile game (Android). Everything works fine when I test my game on the editor (150 FPS) and on my latest phone (One plus 5, 60 FPS), but when I try it on my old phone (LG optimus G5 with android 6.0) I have only 15 FPS.
I try to test an empty scene with only a 3D cube and I can reach 25 FPS. I used the profiler to inspect my game and I see that I have more than 1300 draw calls on my home scene (which I use about 40 differents sprites and 30 differents meshes). I try to put some materials in static batching, enabled GPU instancing, reduce most of the quality settings, but nothing solves my issue. I also tried to disabled every GameObjects of the scene (except the camera) but it doesn't increase FPS (or only 5 FPS).
Here's my profiler on the empty scene (on the LG G5) :
I developped another game with only UI elements and it works fine on this mobile LG G5.
Do i make a mystake in settings ? Or is my phone just too old for my game ? (I try to download crossy road which was made with unity and it works really nice on my old phone..)
How can i improve the graphics performances ?
I'm using universal render pipeline and unity 2019.3.5f.
Thanks in advance ! And please apologize my english isn't perfect.

360 video glitch on Oculus Go APK

I have published the same Unity 360 video app to Gear VR and it works perfectly and used to on Oculus Go. However, recently this glitch has appeared when loading a new scene or playing a video file via VideoPlayer on the Oculus Go. Does anyone know a way of removing this or even what it is? It doesn't appear in the Unity editor and seems localised to the Oculus Go.

Problems recording my 2d game made with Unity (laggy / stuttering)

I'm pretty new to Unity and have a problem. I programmed a small 2D game in Unity that works fine, runs smoothly and doesn't lag at 60 fps. The problem occurs when I try to record a video of my game. No matter which screen recorder I tried (on Windows 10 with Xbox recorder as well as on Android Samsung Galaxy S8 and S5 with different recorders), the video doesn't run smoothly (seems stuttering). I have already tried different quality settings, different fps and switched off vSync, but nothing helped. When I set my game below 60 FPS, the game starts to stutter itself and the FPS is not kept constant. The screen resolution is 1920 x 1080.
I am now very desperate and frustrated about this problem, because I would like to make good quality videos of the game. So if anyone has any idea or suggestions how to solve this problem I would be very thankful!
try this link
it will take you VideoCapture, a free asset made for exactly your purposes. since its free you can add it right to your packages and start using it without trouble, and it elemenates the pesky problem of third party recordings.

Unity game is having lags after integrating admob ads

I just finished developing my 2d sidescroller game and after I integrated admob I am having occassional lags (the game play is not smooth as before). I called the admob sdk load function both in start() and update(). I dont know why its happening. Any help is appreciated.
Is your device an older and slower phone or tablet? If it is then the loading of the ads stresses the CPU which, of course, causes FPS hiccups to your game.