Just as a test, can you try ubuntu? It looks like you tried “enterprise” distros, may be worth with a more generic one, maybe they have a different set drivers.
Also, can you try running lspci command, maybe it shows any devices it doesn’t recognize (so you can investigate those specifically). Pretty sure there is also a gui app about drivers, but I’m not familiar with kde.
Technically speaking, no. But more polite, I agree