I would highly suggest testing the linux-mainline kernel as well as linux-firmware-iwlwifi-git to get the newest improvements coming down the pipeline.
There have been many bugs reported in the last year with both the AX200 and AX210 Intel cards. I would suggest searching both model numbers on the Arch Linux forum. I would try any fixes that seemed promising for either of these adapters posted on the Arch forum as both models are very similar. I seem to recall disabling TSO was found to be a fix recently on the AX200, so that might be worth testing on the AX210.
There’s still a fair bit of problems with these cards because of their relative newness, but they are getting better. Hopefully, a fix is coming down the pipe to correct your issue soon.