On phones which had Samsung’s OLED panels, so this also has happened on iPhones, OnePluses, Huaweis, Sonys (except their Xperia 1 line) etc. etc.

My knowledge here is limited so I apologise if I’m not being helpful, but at least in case of Arch there’s a special kernel flag (amdgpu.performancemask iirc) to allow OC of your graphics card, are you passing one in your setup?

Have you tried using CoreCtrl instead?