Excellent idea and photo already leads mainly to these threads in fact. If any are missing, I can go back and add the tag.
I see Monthly photo competition #1 (Dec 2022) to #15 (Feb 2024) are all tagged, so it looks like everything is in place.
Handy thing to link to a group of threads with the same tag, type “#” and then part of the tag name and you’ll be prompted for the tag and it will create the link like I did above.