Basically just following up with my post here:
https://discuss.flarum.org/d/36403-notify-user-group-when-a-discussion-has-certain-tags
EDIT: if it's better to just re-tag my first post with the dev tag, I can do that too! (Sorry, I just thought of that)
I'm assuming I could work with one of the extensions to add in a section that lets me selects which user groups will be notified for what tags.
Like usergroup A gets notifications/emails for tag 1, tag 2, tag 5
Usergroup B gets notifications/emails for tag 3 and tag 4
Etc..
The problem I'm trying to solve is make it so that once a user is added to a group, they are automatically subscribed to the tag(s) associated by me. So they don't have to manually subscribe. This could be something they disable in their profile like "notifications / emails from group related tags"
I'm not sure if that's the way to go about it, or to have the usergroups be associated with the tags. Like Tag 1 will notify Usergroup C, etc..