I have the same problem here and I'm considering buying a 6GHz tri-band (2.4 + 5 + 6GHz) Wi-Fi 6E router. Problem is: the only ones I can find are "gamer" routers bloated with features I will never use and priced 5x to 10x a regular Wi-Fi 6 (without the "E") dual band (2.4 + 5GHz) router.
Both my phone and computer supports 6GHz, but it's still hard to find a reasonably priced router.
I was going to suggest the Banana Pi BPI-R3, but that still doesn't have 6 GHz. The successor to that one is going to have Wifi 7, but might not get supported by mainline OpenWRT.