Yes. All college attendance data is collected by the National Student Clearinghouse. Often, colleges will check this database for each year’s matriculants (especially those who have taken a gap year/years.)
If your son wants to be able to apply to Dartmouth as a first year (to take one example), he should drop any classes he’s currently in. Unless he already completed a class (or more) in the summer.
Class of 2026 men’s soccer recruiting is complete for many schools. Where do his discussions with coaches stand?