There are no supported TractionNext integrations on the PieSync platform, that support our Deletions/Unsubscribes Sync.
The availability to Sync Unsubscribes/Deletions is app and connection dependent. If the box (screenshots above) is not there to tick, it's simply not possible. We need to be able to detect unsubscribes/deletions on one side and at the same time be able to create add the tag 'PieSync Unsubscribes' or ‘PieSync Trash’ on the other side. More Information on Syncing Unsubscribes here or on Deletions here.