Hello @Matt5
those are notifications since you are added as collaborator to tasks in this template.
I have been facing this issue recently where a team member was getting a bunch of notifications as they have been added to some tasks (in the template project) as follower by mistake.
I would open the project template, edit view, and then select the tasks and remove yourself as follower.
One problem though is that V2 project templates do not allow multi-select at this stage. More info on all features and what is still missing compare to v1 here: Project templates V2: what we gain, what we lose
Also here is an existing feedback request thread to upvote: Decide notification settings for templates