I think if they wanted to keep Jaylen, they could have traded White and Hauser away to make it happen. And for people saying "they don't have value", yeah and neither did Jrue/Porzingis yet Brad still dumped them for salary purposes. Even the Jaylen trade could be viewed as that based on the return. The avenue was there, but Tatum and ownership preferred it was Jaylen dealt. If Tatum wanted Jaylen here and advocated for it hard, I doubt they do it and look at other ways.
Personally I do think White isn't gonna age well in his contract and he's the guy I'd consider moving even for a limited return if it meant clearing his money. He's definitely not worth 32M a year now even with some of the intangibles he may provide. Not just George, but I think if you can clear him + White (or if George is willing to stay on a restructured multi-year deal beyond 2026) you have a path to add a bunch of talent in future years. Queta and PP are on nice, not-insane deals already.