Tech9
Part of the Furniture
Your router is running 388_22525 and this is the base for 388.2 - you can flash on top with no factory reset. Tested, working. If you have VPN configurations in Asuswrt - disable and remove. Re-create what you need VPN related in Asuswrt-Merlin.
My RT-AX86U is set with 388.2 with AdGuard Home. It works well with some exceptions. Don't play with IPv6 back and forth with Cake enabled and 2.5GbE port as WAN because you may have to reset your router after. Keep IPv6 disabled - you don't need it in Canada.
If you want this:
...with this:
...plus Cake QoS - it's easy to do in few steps starting from your current 388_22525 firmware.
My RT-AX86U is set with 388.2 with AdGuard Home. It works well with some exceptions. Don't play with IPv6 back and forth with Cake enabled and 2.5GbE port as WAN because you may have to reset your router after. Keep IPv6 disabled - you don't need it in Canada.
If you want this:
...with this:
...plus Cake QoS - it's easy to do in few steps starting from your current 388_22525 firmware.