His wages are insanely high as he has no agent and those costs are in his salary. (His wife is a lawyer...)
Kimmich has maneuvered himself into a tricky situation as he demands more appreciation by the club (after his anti-vaxxer Covid story).
Reminds me a bit of Yaya's cake. And clubs don't like to back down.
Next problem: his 4 kids are born 2019, 2020, 2022 and 2024.
His wife Lina is 4 years older and she's wearing the britches. You would have to ask HER where he will end up.
Another thought: if you sign him for 40m on high wages for say 4 years what if she wants to leave after 1 year? That bundle is much more difficult to handle. Getting rid is a problem.
He loves to live around Munich and wants to play for Germany. I bet he would like to stay but the club have enough of his big ego ('Kimm-ICH') that is going on their nerves. No idea what Kompany thinks.
Tough to predict.
Its how much he respects Pep that may resolve some of the very relevant issues you've mentioned. As you wrote, tough to predict.