If I say you can “have” “my” possessions, they were mine, but become yours. In this case, they apparently said “use” instead of “have”, but a lot of weapons and munitions are destroyed upon use, and those that aren’t are still being used in a war where it is very likely that they could be destroyed/lost/stolen anyway.
Tl;dr, no, they do not expect these weapons to be returned. They were “theirs”, and now they are Ukraine’s.