How long does the sync runs?

When the 2 stores have just connected, the sync runs right after that.

It may take a short time (some minutes) based on the data amount you sync.

After that, when there is a product create/update event, the app will sync in blocks every 30 minutes (all products created/updated within those 30 minutes will sync)

Please wait for about 30 mins after you made change to Source store and then check the result on Destination store.

Note: all the syncs can not be reverted.