The Nubia & Indonesia DLCs are extra (Nintendo eShop) but the rest, excluding R&F and GS, are included.
I get 2.5 hours of runtime when I undock. Controls are different than PC but once you get a few hours into Civ VI on the Switch you will be fine.
If you have Civ VI on the PC, you can now transfer your save games. Until R&F and/or GS are released on the Switch only vanilla saves work.