My ipad was stolen. Now i wish to access my air tags which were set up on that stolen ipad.

You should be able to use your AirTags with another trusted Apple device that you own. However, those devices would need to be either an iPhone, iPad, or iPod touch ... or a Mac running macOS Catalina or new ... which, according to your byline, you already have a qualifying OS.

Ref: Find your lost Apple device or AirTag with Find My - Apple Support

... so, your AirTag should appear on your Mac's Find My app, under Items. What you can't do is pair them to your Mac, as you would need a trusted iPhone or iPad to do so.

... and my point in my reply to your original post is that if the Find My app on your Mac cannot "see" these AirTags then you cannot "unpair" them without your stolen iPad, and pair them with this Mac. You would need another iPhone or iPad, using the same Apple ID as your stolen iPad, to pair with them again.