Hey Doug!
Whoa, is inSSIDer 5 actually getting some data from your AX210? I’m surprised to hear that. I don’t have a laptop with an AX210 (yet), so I haven’t tested it at all. Feel free to contact us at support@metageek.net with some screenshots, if you’d like.
As for whether we plan to support 6 GHz with inSSIDer… yes. Absolutely yes. The question is when! I wish I could give you some kind of time table, but I think it would just end up being wrong. For now, I’m going to stick with “soon”. I hope that isn’t infuriating.
When we do support 6 GHz with inSSIDer, I think we’ll bump to calling it inSSIDer 6. We figure that’s just too good of an opportunity to pass up. 
Stay tuned for updates and stuff, especially once we get into the new year!