Well, it can be. But usually in my experience, as long as the proper driver is used, Nvidia GPU's are easier to setup in Linux, then AMD GPU's. This is because Nvidia has greater driver support, and easy of integration in Additional Drivers, as you are clearly seeing.
AMD users have to hunt down their drivers from the internet, and install them manually, and hope their system doesn't BLACK SCREEN upon reboot.
OK, my next thought is, did you disable SECURE BOOT in the BIOS? Because if SECURE BOOT is enabled, as it is usually by default on Windows systems, then that could be interfering with Linux ability to interface with the hardware.
This is why we all preach to disable SECURE BOOT with Linux. Also, if your system is new enough to have TPM, we recommend disabling that in the BIOS as well. But for now, lets just focus on SECURE BOOT.
Do you know how to get into your system BIOS? Shutoff your computer, then press the power button to turn the computer on.
The button you press to enter the BIOS depends on the brand of the machine. Its either spam hit the DELETE key like your life depended on it, or SPAM the F2 key like your life depended on it, or spam the F12 key like your life depended on it.
I don't know which yours uses without looking it up, and I am eating my dinner right now, so yeah. Anyways, hope this helps