How do we get a stable 72 fps in Quest 2 Unity application?

Hello Unity developers I am trying to publish an app in the oculus store but the required framerate is 72 fps After so much research i was able to hit 72 fps in my game , but not every time sometimes (at worst case scenario) when looking at other objects the fps drops to 40 to 48fps and at normal game view it goes up to 55 to 60 fps or sometimes 65fps I changed my settings To URP render pipeline using openGL Other recommended settings for oculus quest 2 I am maintaining triangle count in between 1.1M to 1.4M Draw calls at worst 340 least 210 Set pass calls are at worst is 54 I reduced each and every texture with ASTC (6 × 6) and highest texture size in the whole game is 3.4 mb With GPU instancing enabled in all materials There is only 1 reflection probe(baked 512 resolution) no direction light Ocullusion culling enabled Smallest occluder 0.5 Smallest hole 0.25 Back face threshold 100 In the scene i am using the OVR player controller to move around No post processing anti- aliasing to 4x Terrain holes disabled And 2 FBX files are instantiating each file 30 mb with the textures There are only 2 animators in the whole game And that is basic(2 animations) Help me I tried everything I know but I was not able to achieve the stable 72 fps I can't use LOD (level of detail group) by the way for this game.

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