ASUS - ZenTalk

well no version after 305 will give you access to voltage and clock settings, so whatcha gnna do....

Short answer, no. Its designed to throttle when hitting those Temps. So it will allow it for short periods before adjusting core clocks and cpu load distribution.

https://zentalk.asus.com/en/discussion/29744/how-to-rollback-bios-version-of-asus-zenbook-pro-duo-ux581-solved

downgrade to bios 305, then you'll be able to use throttle stop or xtu to tune it a bit