There are MANY smaller local, regional, national and even international airports that still have mislabeled taxiways, missing ramp areas or terminal wings, and in at least a couple of cases, entire missing runways. In most cases the missing parts with stock autogen airports can be fixed well enough to get by using stock assets. Combined with creating missing runways and renumbering taxiways, etc., that will still be a massive improvement over whatever autogenerated stuff the sim comes up with using 5-7 year old satellite imagery. There’s no need to add new models for these purposes.
If you do want to go as far as adding your own models, fine. Release it through the usual channel.