It is benefitial to read the installation instructions...
Now I also understand what you mean by uninstalling. The pro driver was installed, it just wasn't working (which I somewhat expected) and therefore inxi for some reason showed that no driver was installed. So in order to just install the default drivers I obviously had to uninstall the pro drivers first.
Default drivers can be specified with the option --usecase=graphics but that may be the default selection anyway so idk
I also get these warnings during installation but they're probably not relevant:
W: Possible missing firmware /lib/firmware/amdgpu/ip_discovery.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vega10_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/aldebaran_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_0_toc.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_mes1.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi10_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_4_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_2_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_1_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_0_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/smu_14_0_2.bin for module amdgpu
The problem with proton remains though, even after installing both implementations of vulkan with --vulkan=amdvlk,pro. This thread suggests I should try a newer OS version to use the 6.2 kernel (I am on 5.15.x already), so I will switch to Zorin 17 when I have time and report my findings.