Not a clue.
She did go through senior ceremonies along with Joanne Allen-Taylor and Audrey Warren; all 3 have one season of eligibility remaining. Joanne declared for the WNBA draft. No word from Audrey yet on her intentions. Not counting any of those 3 players, Texas has 3 scholarships remaining at the moment. So, it's not necessarily about the scholarship numbers and/or incoming freshmen signees coming in and the roster being overcrowded.
Ebo has been very complimentary of her time at Texas; in one post-game interview this Spring, she said coming to Texas was one of the best decisions she's ever made. Vic has also stated several times this Spring that she was the team's most improved player over the last 2-3 months of the season.
Her reasons for leaving could be strictly academic (perhaps wants to go to grad school somewhere that specializes in her area of study). Could be that she's played under 2 different post position coaches at Texas, and that would have been a third as Texas is currently trying to replace April Phillips (new head coach at San Jose State).
Texas will miss Ebo. She was so good defensively, especially against KSU's Ayoka Lee. Texas has no one else like or as experienced as Ebo in the post. So, that has to be a priority in the transfer portal.