I'm currently testing and so far they are working with S+ large and small boxes, the S+ forge and the S+ compost bin. Have not tested beyond those items yet.

This is the question I had and the answer I was hoping for, thank you both!

I have just added this to my servers. I had an S+ Large storage box up and they never added to it. I put up a vanilla Large Storage box and they immediately started adding items. the S+ forge , campfire, trough, all seem to work just fine so far. waiting to see if the use the composte bin.

Are they harvesting the resources though? My experience is that they just run around making their noises but dont cut trees. The Forager doesnt grab plant items but grabs vanilla berries and fertilizes vanilla crop plot.