I don't think this is what skeuomorphic means.

Yeah, this isn't anything to do with skeuomorphism. This is just a collection of 3D/Isometric icons for a purpose I can't seem to understand from the description.

probably meant to look like the new Airbnb design library

I think OP might have meant something closer to neumorphic/ claymorphic design?

What is the license of the icons?

Nice collection. The looping scroll interface is confusing.

Cute

Nice. Could be very useful. Thanks.