Meantime I installed another VMC - same standalone instance, same sw version - and there it seems the mesh recovery profile is there, so something went wrong on my controller, but it woudl be nice to have a commande which can enforce the regenartion of the recovery profile.
[mynode] #show ap mesh-recovery-profile
AP Mesh Recovery Profile
------------------------
Item Value
---- -----
Cluster Name RecoverypUgwAoAXwDH8Ll2X
RF Band a
WPA Hexkey ********
WPA Passphrase N/A
Encryption wpa2-psk-aes