It’s been explained in other threads.
Me personally I think everyone from 2020 should have gotten another year. But I understand why they didn’t, and the tricky part is that if someone didn’t qualify for NCAA’s, they didn’t miss anything. So do you only grant another year to those who qualifyied?
In 2021, the reason it was a “free year” was because there was concern Covid might cancel another season, so they offered the free year as an incentive for everyone to compete.