Iphone 12+, os 14+ low performance / slow / lag

We are getting reports that our game performs poorly on iPhone 12+ , iPhone Max operating on OS 14+.

The game appears to be running at under 30 fps?

Is anyone else having the same issue?

The game has targetfps set to 60. Built with 2019.4.22f1.

I just tested this on my ipad 6 generation and it seems FPS is locked to 30 even when unity code has Application.targetFrameRate = 60;

Seems like UnityGetTargetFPS(); from UnityAppController+Rendering.mm is set to 30?
maxFPS returns 60

I hardcode targetFPS from - (void)callbackFramerateChange:(int)targetFPS to 120 and everything is smooth…

Can someone from Unity confirm if hardcoding targetFPS to 60 is a bad idea?