I have an Archer AX21 and already had an RE450 extender and created a One Mesh with those two. Got another RE450 and during setup, it does not give me the option to select One Mesh. Even after it's...

First time poster so am hoping I can get some help. i have an Archer A9, connected directly to an AT&T modem that is getting 900mbps+ on a speed test from the fiber to the modem. I have teo Roku...