As always “it depends”.
Middle school ages are the big growth spurt years. Kids who were great at soccer because they were fast, grow and slow down, and now are not great. Okay. There are lots of other sports.
I tell people all the time that my own daughter played very high level youth soccer, over the years, played with girls who later played/competed in a number of college sports for very large colleges. Soccer was something they did along the way because it is a team sport that lots of kids start out in. You can and should switch.
And, while fitness is important, there are lots of new activities starting at middle school ages to consider. Art, music, acting all get going at those ages. Take an acting class. Join a youth choir. Take up kayaking. Stay fit and find things that interest you. Expect that not everything will fit the bill, but give things a fair shot.
I have one kid who took up weightlifting in college, and another’s hobby is cliff jumping. (The only one in the family not afraid of heights.).