Entering Bios in UBook XPro / Windows 11 reinstall

Hello,
how can i enter Bios on UBook Xpro ?
I had issues with the driver in Windows 10. The camera did not work.
Is there a way to reinstall new Windows 11 like it was from Factory ?

Best Regards
Markus

Hello,
short Update.
The drivers looks okay in the system setting of windows 10.
But only one camera is working. Either the front or the rear. Both are not working at the same time.
It depends which driver i have installed as last.
How can i fix this issue ? I used the drivers from the chuwi forum.

Best Regards
Markus