Hi Gidon
I'm not with Laminar Research, just a fellow simmer in the UK.
X-Plane 11 ships with numerous airports and airfields located all across the world and most of the former have basic terminal buildings and the latter have buildings to a lesser extent.
If you wish to obtain the really quality airports etc., then some of these can be downloaded from X-Plane.org as freeware and others also from X-Plane.org or 3rd party sites as payware.
Here's an example of a freeware airport (Phoenix Sky Harbor) from MisterX6 on the X-Plane.org forum which is very good, as are his other airports:-
https://forums.x-plane.org/index.php?/files/file/26819-kphx-phoenix-sky-harbor-international/
Here's an example of a payware airport (Cedar Rapids Iowa) also from X-Plane.org:-
https://store.x-plane.org/KCID--Eastern-Iowa-Airport-Cedar-Rapids_p_940.html
The best thing to do is have a look around the X-Plane.org website to see which airports etc., you can get as freeware, there are quite a few.
Hope this helps?
Regards