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.
Both my phone and computer supports 6GHz, but it's still hard to find a reasonably priced router.