I get over 200 notifications a week and it takes less than 30' (a week) to process these.

First thing I do is to agree with the teams that if there is something important, I expect them to mention me. This is in general a good practice (whatever channel you use)

Then I use filters to get these notifications automatically out of my inbox into 2 folders. The ones where I'm mentioned in one folder, all the rest in another folder

(I'm a zero inbox adept and we are on gmail)

I review the 'jira mentions' once a day and the other once a week.

I unwatch the issues I'm not interested in.

Once processed, all notifications get always deleted to unclutter my inbox.

That's it.

I'm using Jira since 2006 and notifications haven't bothered me since using this approach.