Does it show up if you do a restart?
Its got a UEFI bios running in legacy boot mode, that is fairly normal. Don't change this or PC won't boot.
I expected you were in fast boot mode but I can't see that in your motherboard manual
You are likely to able to get into bios via advanced startup in Windows 10
go to settings/update & security/recovery
Under Advanced Startup, click restart now button
this restarts PC is advanced startup
Click troubleshoot
Click Advanced
Click UEFI Firmware settings
This should load you into bios once PC restarts
I would look on the Boot tab and set Full Screen Logo to disabled & enable GO2BIOS - Enables or disables the system to power on and go to the BIOS setup directly by long pressing the power button about 4 seconds when the system is off.