Not sure why the exact model of my router is any relevant, if it implements a specific wifi standard, but it's a Mikrotik C52iG-5HaxD2HaxD-TC. I was trying to upload some pictures tho, but the site didn't let me. Motherboard is a ASUS ROG STRIX B760-I, it has a Intel(R) Wi-Fi 6E AX211 160MHz on it.
Additional info is that my 13th gen lenovo thinkpad with same windows 11 on it is doing the exact same thing. My android phone on the other hand always connects as wifi 6, so I believe it's not a hardware but a windows issue.