Refresh (Unmanaged) Supergraph Schema at regular intervals

Hi Team, I am looking to refresh the Supergraph Schema to accommodate subgraph schema changes in real time.
The introspectAndCompose does have a “pollIntervalInMs”. However, introspectAndCompose is not recommended for Production!
Is there any other similar option with supergraphSdl ( May be with supergraphSdlHook or SupergraphManager? ) ?
I also have the composed Schema in an S3 bucket , but not sure on how the Supergraph Schema can be refreshed when S3 is polled.
( NOTE: Looking for options apart from Apollo Studio at the moment)