I don't think they've released the official list yet. To my knowledge here are Big 12 players that gone and the Big 12 players that are on the fence.
Gone
Solomon Young
Jared Butler
Davion Mitchell
Macio Teague
Mark Vital
Marcus Garrett
Austin Reaves
Cade Cunningham
RJ Nembhard
Matt Coleman
Greg Brown
Kai Jones
Mac McClung
Derek Culver
On the Fence
Matthew Mayer
James Akinjo
Ochai Agbaji
Jalen Wilson
Remy Martin
Bryce Williams
Jericho Sims
Courtney Ramey
Terrence Shannon
Miles McBride
Taz Sherman
Sean McNeil
So...
Mayer - likely back
Akinjo - likely back
Wilson - likely back
Martin - likely back
Williams - likely back
Ramey - likely back
Sherman - likely back
Agbaji - unknown?
Shannon - likely gone?
McBride - likely gone?
Sims - leaning gone?
McNeil - unknown?