Capsman - wireless uplink

Greetingzzzzz
I have 3 access points provisioned by capsman and everything is stable. Capsman has been activated on a RB2011iLRM.

I would like to add an extra access point which is wireless connected on one of the 3 access points. (no utp available in the garden)
How can I do this ? Can I do this by capsman when the new access point is first “connected” to capsman ?

Do you have experience concerning the stability of the wireless uplink ? No caveats ?

Secondly - is there a cloud controller available like Ubiquiti Unifi has which presents nice statistics ? I didn’t find any tool atm.

Wireless greetings,

Sibi