AP15C & AP55C on Sophos Central

Hello,

I have to migrate all my APs on Sophos Central.

I have many different models (~60). Most of them are APX320, but i also have AP55C & AP15C.

I would like to know if AP55C and AP15C are compatible with Sophos Central ?

I tried to migrate an AP15C on Sophos Central.
I disjoined it from my UTM.
I saw on my FW logs that this AP accessed to the IP 1.2.3.4 on port 2712, it also accessed to multiple IP for NTP.

But it did not join Sophos Central.

I did the same process with a APX320. No problem.