The plug-in itself doesn't do anything with DAOS.
The recommendation from IBM is to set the DAOS deletetion interval to be equal to the restore interval + 1 day.
So if you support restores for one month (31 days), set the deletion interval to 32 days.
This should endure there is enough within DAOS to handle your typical restore.
The other option is more involved.
Basically restore the database, then run tell daosmgr listnlo missing <dbname>, restore any missing NLO files, then copy/paste the needed documents.
If the recovered database is deleted after this (at the OS level) then a doas resync would be required.
If the Domino APIs are used to delete the recovered DB, then a resync shouldn't be necessary.
Last time I talked with IBM about this there wasn't really any easy way to automate this - manual intervention is required if the restore is past the deletion interval.
TR-3917 has a small section on DAOS.
I thought I had the above info in a TR, but I can't seem to quickly locate it.
Hope this helps,