There were about 1000 players in the portal last year in Womens Soccer. Expect it will be higher this year. Some interesting data from ncaa here:
https://www.ncaa.org/sports/2022/4/25/transfer-portal-data-division-i-student-athlete-transfer-trends.aspx
65% of D1 players who entered the portal actually transferred to another team
61% of D1 transfers continued to get athletic money
21% of D2 transfers moved to D1
There will be hundreds of players who are unsuccessful in transferring and their college soccer career is essentially over. I hope they picked a school they are happy at without soccer.
Hundreds of players will transfer but without scholarships. Lesson: Just because you get a scholarship does not mean it will last 4 years.
Not many are able to go from D2 to D1. Don't choose a D2 school thinking it's a stepping stone to D1. People mostly move down the ladder not up.