I don’t think these are fungus gnats. Too large. Can you get a better photo of just a couple of them? Zoom in to a little less than 50% and hold the phone about a foot away. Should get decent resolution and detail.

After that get out your vacuum and suck those things up and kill as many as you can with a swatter. If it looks like they may be from your plants get some play sand loosen the top layer with a fork and smother the top with sand then let the plants dry out and vacuum the top layer and the sand off them reapply sand and treat with a light solution of cold pressed neem.