FPS Halves to 30 when i enable using depth or opaque textures on URP Mobile

Having depth or opaque textures or both at the same time halves my fps on certain mobile devices.It seems not all mobile devices react the same way, some of them still getting 60fps but when i test on my mobile phone it caps at 29-30fps.My phone is huawei p9 lite and its a not a high end mobile but im sure that its not a low end eeither, i dont know whats going on here any help ??