Diana has had the plane even if she flies. Especially when she is having multiple people to help. So I can’t see what would be wrong with her having it. Diana is all about helping people. Going back to a version of one of the jets. Why not instead of it being a jet rather it can be anything Diana can create? An invisible object Diana can use. Or give the jet to Steve.
I mean I feel there a reason more people want the jet more than the dome. I rather it be given to Steve.