How to just add ground services to a default airport?

Hello,
I wonder if there is a way to just edit parkings to add more ground services to a default airport WITHOUT recreating the whole airport or deleting taxiways or aprons?

Same question. Default small airports have no ground handling services. I’ve been watching SDK tutorial videos but it didn’t work. I just want help on how to add it.

No, you can’t edit “parkings” without redoing the airport. You’d have to redo the whole runway / taxi system.

One good way to start is to use Airport Design Editor by @ScruffyDuckJon . Just do a search for it on Google. It allows you to create a project from a default airport so you have something to start with.