Not currently

Because otherwise the superpowers have zero incentive to participate at all.

There’s no way they realistically hold or capture any of this. They just don’t have the logistics. But it’s an amazing opportunity to create a dilemma for Russia. They either 1) ignore it and let Ukrainian forces rampage around in Russian territory unopposed or 2) they redeploy forces from the front to defend Russian territory.

The Ukrainian forces should stay nimble either way, and retreat without too big a fight back to their own territory in the latter case, hopefully having caused enough of a diversion for a counteroffensive where they need it.

Funding? No. But with the Iranian drone/missile strike US and other allied forces were doing interceptions. That’s not happening in Ukraine unless there are some dramatic escalations, right wing memelords or no.

Because Iran doesn’t have a massive nuclear weapons stockpile.