Good looking text labels

I have seen people use these labels style

is there a specific plugin that is being used to create this? or are they creating rounded rectangles at the points and just giving them a colour (I am assuming that if new rounded geometry is created at every label, it will get really slow if we have more than a 10000 or so labels in the geometry. )
So my question is how do I create these labels in the most efficient way possible.

Also if I create rounded rectangles they won’t be oriented according to my view.

Those are rhino stuff:
2022-06-12 13_12_07-Untitled - Rhino 7 Commerciale

You can find these as part of the Elefront plugin


Thanks a lot.