Sort of relevant, sort of not:
https://www.theguardian.com/football/2025/oct/19/englands-under-21-leagues-are-filled-with-players-whose-clubs-see-no-future-for-them
Bottom line is that even at the top levels in England, it's a difficult pathway and these are players who are at the very best clubs. The idea that lots of college players are going to progress to long, well paid professional careers is optimistic at best. I am guessing the ones that don't progress in England are some of the same ones coming in as more mature players at the college level and who would be undoubtedly attractive to many coaches.
https://www.theguardian.com/football/2025/oct/19/englands-under-21-leagues-are-filled-with-players-whose-clubs-see-no-future-for-them
Bottom line is that even at the top levels in England, it's a difficult pathway and these are players who are at the very best clubs. The idea that lots of college players are going to progress to long, well paid professional careers is optimistic at best. I am guessing the ones that don't progress in England are some of the same ones coming in as more mature players at the college level and who would be undoubtedly attractive to many coaches.