I had a look upon questions tagged with zoom. Only a small portion of them are related to the meeting app "zoom". I was able to only spot three. Most are using it to show that the question is related to desktop zooming effect.
So I guess creating a new tag should be the correct decision here. Something like zoom-app as suggested or zoom-meeting or even zoom-meeting-app.
So we won't end up in the hassle of refining all these question tagged with zoom which are actually related to "desktop zooming effect".
Edit:
zoom-meeting Has been created. I was able to find and edit 14 related questions adding the new tag. We can also create some synonyms like zoom-meeting-app or zoommtg as suggested in comments.