The transfer process is so volatile, schools can get involved at any time with NIL proposals that can change minds etc. Even if a kid announces a commitment it is not binding until they are on campus, enrolled in classes.
As for Fidler, things seem pretty quiet on the reporting front so I have no idea. What I do know is that there are about 2000 kids in the portal right now and many will not find new homes. I’m sure UW will get a couple players that can contribute for next year just no idea who they might be