I think the Russian Empire will not give away expensively conquered land and people to basically a political vassal who is a member in a concurrent political entity and system. Today’s Political Hungary might have powerful aspirations, but it’s current actual power is somewhat limited to a gatekeeper (migration, military aid, energy flows) since Hungary is not a big entity like the USA, Russia, China or the EU as a whole.

I wonder how much the situation would compare to a hypothetical scenario where Texas would hold trade talks with China.

Once this is all over and Ukraine still exists, Hungary probably won’t be a friend of Ukraine.