Is it possible to update a Note to tag and notify users when no one is tagged?

I have built out a scenario in Fusion and I can fetch and read the note/update and notify those not tagged. But, I would like to update the note/update to add tags. I’m able to create a new note/update that will add tags but I don’t want to create a new one I just want to update the original with tags.

Is this possible?

Thank you in advance for your insight.