Alwayson Availability groups for a WSFC hosting mutliple SQL FCI's

Hello,

I have a question regarding SQL server FCI's and alwayson availability groups.

Today I have a customer running a 2 node WSFC hosting 9 different SQL FCI's.

Plan is to introduce on this setup SQL alwayson availability groups one per SQL FCI.

Per SQL FCI, running on the 2 node WSFC, we are planning to introduce a dedicated
alwayson availability group with 2 replicas. On replica as primary linked with the
FCI and one replica as secondary on 1 extra node added to the WSFC.

Question i have is, is this a supported configuration?

Thanks in advance

Regards
Raf