Is there a 'flag' for Unique properties for AirBNB or VRBO.
For Airbnb, yes - they are options under Type in Properties > Amenities.
Looking for A frame. Anything like that?
Doesn't look like it no. It's a pretty long list but doesn't have that. We get the list from Airbnb, so, you could maybe suggest it to them to add. :-)