Perhaps a chance, but certainly not unlimited patience or a guarantue to play regularily.
There is this ongoing myth that Borussia Dortmund completely doubles down on playing youngsters no matter the results and thus attracts top level talents. A lack of fear to throw in very young players and a lot of experience in talent development which leads to a certain amount of patience to see them develop does not mean that it is easy to become a regular starter at Dortmund as a talent. Ultimatively they need to earn that right by performing on a standart needed to bring Dortmund the results they need to statisfy the expectations that exist for that club.
People just focus on the talents that made it big at Dortmund like Sancho, Ousmane Dembele, Achraf Hakimi or Jude Bellingham but forget talents like Alexander Isak, Mikel Merino, Emre Mor or Leonardo Balerdi (all highly rated in terms of potential) who never truly made the cut and went on to smaller clubs to develop.
Jadon Sancho was not an undisputed starter for three years because he was young or has a very high performance ceiling. Jadon Sancho played pretty much every game possible because the guy averaged a goal or assist every 89 minutes in his first full season, which he by now pushed down to the low 80s, making him one of the most productive offensive midfielder in Europe.
People like to disregard these numbers because they come from the Bundesliga, an inferior league, that is often described as defensively leaky by outside fans, but especially in the comparision with Foden this holds very little weight, because while Foden might play in the tougher league, he also plays in an even more offensive minded and certainly more stacked team. In the three full seasons Sancho spend at Dortmund, City actually scored slightly more goals on average (2,45 vs. 2,35) than Dortmund.
As result Foden might find it harder to start compared to Sancho, but if he plays he has an absolute elite group of players around him to play with. Foden never had to do creative heavy lifting on a similar level as Sancho did in his second and third season. He also has not reached the same level of productivity as Sancho with 26 goals/assists in 3370 minutes in all competitions last season. Sancho did not only outscore him by 10 goals/assists, he did that with around 400 minutes less play time (he actually struggled a bit with injuries and form).