Welcome to the Community!
The modem/router that we provide currently support IEEE 802.11a/n/ac for 5GHz network.
We currently don't have any lists of modem/routers that support 802.11ax connection, but you may check on the specification of the products or modem/routers that you like.
Make sure that it is compatible with your current internet service.
Thanks for your confirmation/clarification here.
Can you please help upgrade the firmware for my current HG659?
My customer ID is 4469613