The whole 2022 is under one roof created to such but this does not mean that it is totally separated. I know because a close friend of my wife is working with them from the time Qatar is bidding until now.

The new airport have been there for a long time.

The new Rail transit is on the table again for some redesigning but last I heard is now on going awarding to 14 contractors or 14 segments (not sure 100 %).

With or without 2022, these two projects were already in-planned. For the 2022, mostly are the stadiums and the roads connecting these super structures. As for contractors and electrical subcontractors, have no specific ideas as I know they are still on finalizing the awarding of contracts.