If this is possible, I would love this! It would be a very important tool for me as a mod too!

This would be super helpful for me too, as a way to keep track of which interactions I still need to return. Say I get five interactions, and I return three of them but can't return the others (because I'm out, or because all their pets are hoarding). I'd like to be able to selectively mark the three returned interactions as "read," or alternately to be able to tag the others as "unread."