All the Model 3s with v2 were offered a free upgrade, I suppose there could be some people that never bothered and then sold their car, but if it's in Tesla's resale inventory I would expect them to have done the upgrade.
My 2018 Model 3 got the upgrade and I use FSD daily, though it still has the older revision of the display (just slightly less responsive in web browsing and games).
Someone made a parser for the Google QR codes and now some apps can import them directly. I switched to aegis this weekend and it worked perfectly.