Does anyone know what moves over to Steam if anything after playing the game throu MS Store

I’m planning on buying the game at the end of the month on Steam, does anyone know if your save or anything is transferred over? Now, I don’t really care if the save transfers over, that’s a minor issue, but if I accept the cars from the past games etc, am I able to get them on the Steam version aswell or are they just gone after that? What about liveries? I’ve been trying to ask these questions on Forza’s twitter and when they’ve done their livestream and Q&A’s but none of these have been answered.

Liveries wont transfer over and tunes wont transfer at all because of the new PI system or the new physics engine or something like that. All the loyalty cars will be given to you regardless of where you buy it, but I’d still just buy it on the Microsoft store and deal with it.