It is possible if Joshua Kimmich considers to move to EPL teams but I am not sure he wants to join Man United. Man United is a very unstable team, Joshua Kimmich will risk his career if he decides to join Man United. I think he will prefer to join Man City, Liverpool, or Arsenal that perform better than Man United in every season.
I guess that Joshua Kimmich will for sure not leave Bayern Munich and that his contract there will be extended in some way.
If he really join another Team (what i dont thin) it will be maybe only 2 or 3 teams maybe , Manchester City or Barcelona have the best chances.
But in my opinion he will stay in Munich and he will end his career there when the time has come for it.
It's common that great players who have achieve to many title with Bayern want to try another challenge outside germany. we have seen that in the past. but there are compelling reasons to believe that Joshua Kimmich is likely to remain with Bayern Munich and possibly extend his contract with the club. Kimmich has become a linchpin for Bayern, showcasing exceptional skills both defensively and offensively. His versatility and ability to contribute across various positions make him an invaluable asset, and Bayern is well aware of his importance to their success.
Kimmich has been an integral part of this success who won numerous trophies with Bayern, including domestic league titles and the UEFA Champions League. He has been with Bayern Munich since 2015, and there seems to be a strong bond between the player and the club. But that success is also a reason for him to try another challenge. Manchester City or Barcelona might be tempting options for him. Guardiola who shaped his versatality would be a reason, if he choose Manchester City, but he wants to have a big impact on a team, he would chose Barca, because they really need an experienced player in midfield after losing Busquet.