Hello, this is Emily.
BIOS is the firmware of the device, it is NOT part of Windows 11. So this is a strictly HP specific issue.
According to HP's instruction, you need to use the ESC key first to launch the Startup Menu, then use F10 to launch BIOS.
https://support.hp.com/us-en/document/ish_39126...
If that still doesn't work, you might want to try another keyboard in case there's issue with the keyboard.
You can also clear the CMOS battery and try again.
If it still doesn't work, it is best you contact HP support or ask in HP community because this is not a Windows issue. https://h30434.www3.hp.com/