BluSdUp wrote a sensible reply on page one and 7E7 has just done another one. The rest, I guess, is just people wanting to have a what if conversation. Any delays to the aircraft getting fixed are likely down to the unit having to be shopped or replaced. There may be some red tape, but no more than usual; and this sort of thing is usual in countries like Iran.
Now if the Iranians wanted to buy a Max 8 or CFM engine for themselves, that's a different story...