Stuttgart has not been very consistent this season, but I wouldn't write them off just yet. They're unpredictable and, on a good day, they can really play a quality football.
Bayern is, of course, a big favourite, and betting on Stuttgart you could get odds of x7.0, but let's not forget that Stuttgart has won their last clash, beating Bayern 3-1 (in May), so it's not impossible they could do it again. However, Bayern hasn't lost to Stuttgart at home since 2018 and home advantage could be a big factor here.
Do you remember last season how quickly Stuttgart were able to get to the top of the German Bundesliga table and they were able to mange to stay there for quiet some time but didn't get to win the trophy but importantly they got people surprised which set the pace for them to have a champions league appearance but in the champions league they haven't been doing so well and this includes in their domestic league and i don't see this as enough to write them off immediately but keeping hope alive, they are definitely going to get better before the end of the season even if not in the champions league.