I'm really not knowledgeable on any of this, just doing some basic research before making any decisions. This is one of the routers I was considering, and it's listed as tri-band 802.11ac. No mention of .11ax anywhere in the data sheet, so that's what threw me off.
And thanks for confirming the RJ ports aren't a possible solution. I skimmed over some things about people converting their ports, but didn't get deep into it because, like I said, it's not something I was interested in tackling any time soon.
I appreciate the help.