AP Controller for Max BR 1 and AP One AC Mini

I have a Max BR1 I have been using for about 6 months and am trying to add an AP One AC Mini to create either a mesh or wired AP. I’ve looked at the Mesh Support Howto and seemingly have a mesh set up, at least the AP Mini says it is a mesh. But, I know it is not working correctly as no traffic goes over it. I’m confident it is not setup correctly. My vendor keeps telling me to go to the AP controller and enable external APs. As best I can tell, the Max BR1 and AP One AC Mini do not support the AP controller. Is that the case? If they are supported, how do I see them from the AP tab? I’m running the lastest released software for both.

Sorry for being such a newbee at this.