Is there the ability to globally update relationship end dates or add them to a profile for bulk updates?
I'm guessing you already looked at Batch Update Relationships although it seems like maybe the extension technique isn't working anymore.

The below is maybe only a step above running some SQL directly and I don't recommend it for the average office staffer but it seems to work and is mostly straightforward. The danger is if you get the criteria wrong you might update way more relationship records than you thought.


Visit [your_site_url]/civicrm/api4
Make it look like this screenshot, where you pick the appropriate org contact and set the end date at the bottom to the appropriate date.

Optionally add a "where" criteria for a specific relationship type or types.
Click Execute.
At the bottom right you should see a list of the updated ones.