I will answer my own post for future readers. I have learned that mesh + wifi extenders are not designed to work together. For my use case, I will need to purchase an additional mesh node - I believe...

We recently purchased 2 pack Deco X68 system to replace a Synology router + 4 Netgear AC 1200 extenders. The new mesh system is working great, except I would like to use 1 extender still to bring a...