in the ipacs forum you'll find a section user created content: https://www.aerofly.com/community/forum/
There are several different aircraft liveries available, but no custom airplane yet.
There are also 2 small airport sceneries NAS Whidbey and NAS Pt. Mugu and a small test airport Waynesville done as very first projects.
But additionally OrbX published the Innsbruck scenery and the Chicago Meigs scenery (with a following update on the way).