Atlas/ Atlas passive tree and alt characters in poe 2. Shared?

Can't seem to find any info on this via faq or search option here. Was there any discussion on if the atlas will be shared with newly leveled up toons? What about the specialty areas/bosses that give you permanent character boosts? Any link or discussion would be appreciated. Thanks

Edit: Title

I assume not.

i assume yes but that’s just based on poe1 atlas being shared

For campaign buffs I don’t think they share

More of a possibility of using two different characters in the same map. Mapper for clear, Bosser for bossing if it's a little to juiced up. Clearing a new atlas for each alt might be good, or not. I've watched a lot of content and it seems like nobody is bringing up the possibility.

Edit: I guess sharing also applies for the atlas passive tree as well. Shared or locked to character.