I checked in a system nearby and it shows 5.4 and 6.5 respectively.
Remove the power cord of your laptop to see if it detects it.
Otherwise, try a full uninstall of both graphics adapters, download both drivers from the system manufacturer’s website, and then install Intel drivers first.
Thank you joe_intel for checking,
I've decided to send the AMD graphics card for testing as we're now sure it is a physical issue since it's not being detected at BIOS.