She will be eligible at the beginning of next season, since everyone gets one free transfer without sitting out.
There is a tweet out there saying she has three seasons left, but that's not true -- she played last year and this year, and both were after the 2020-21 free covid year, so she has two seasons left.
(Unless she mysteriously got hurt and couldn't play the rest of the season and took a medical redshirt -- because she's under the 30% limit -- but I'm not sure how that would work with a mid-season transfer.)