This!
This!
Also interesting to note that this site displayed the same level of confidence that the Forester would get an and improved engine configuration (XT) in 2021. That didn't happen.
I think it is reasonable to conclude this 3600 system comes sometime in 2022 or 2023 model years, but the Forester is typically a mid end vehicle when others like the outback and ascent are higher end. It makes WAY more sense they would bring this to the Ascent before the Forester (or both at the same time).