Which "Radeon Card" is it?
Important to know.
Something similar happened to me last week.
Nothing to do with Dell or intel drivers though.
Secondary RX Vega 64 Liquid completely dissappeard from my system after updating Adrenalin 2020 21.2.3 to Adrenalin 2020 21.3.1.
Use DDU to uninstall existing AMD GPU Drivers.
Leave your Intel Drivers alone. Do NOT touch them using DDU.
https://community.amd.com/t5/drivers-software/amd-driver-fix-and-install-using-ddu/m-p/426238
You can find the Driver for your GPU in AMD Drivers section of web page
https://www.amd.com/en/support
I would have thought you would want to install pro drivers on a pro card.
Maybe your Dell Machine needs to use specific drivers from the Dell website for that card though?
If that does not get your GPU back then perhaps the hardware has failed.