Hi PhilipsKeith-1816,
Yes, I think it is feasible.
But note that only one FCI partner can host a replica for a given availability group. When an availability replica is running on an FCI, the possible owners list for the availability group will contain only the active FCI node. And FCIs do not support automatic failover by availability groups, so any availability replica that is hosted by an FCI can be configured for manual failover only.
Please refer to Prerequisites and Restrictions for Using a FCI to Host an Availability Replica and Failover Clustering and Always On Availability Groups which might be helpful.
Best Regards,
Amelia
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