Do you honestly think that's a hill the NCAA wants to die on--age limits?
The NCAA has bigger problems than that, which would mean in all likelihood, another court fight. I'm sure some lawyer is just waiting to go after the NCAA for age discrimination, and the NCAA most likely isn't gonna want to take yet another L in their quest to maintain control of college sports. They've already taken an L on NIL, and now having to share revenues with athletes.
Next big thing will be the NCAA's billion-dollar contract for the basketball tournament. The athletes will want a piece of that action, and the NCAA will fight for that before they will fight for age limits.