Ready to play and actually playing are two different things.
First, assume he's physically able to come back (which will happen): it'll take him time to get into 'game shape' as well as work his way into the rotation. Everyone else will be a couple months ahead of him and it's tough to catch up.
Then the 2nd question is whether it's worth burning a medical redshirt for 1/3 of a season. Will we "need" him, or are we better off keeping him on the shelf until next year? Or does it not matter since playing 4 years isn't in his plans?
Thinking Self, the staff, Jalen and his family will have a lot to think about. Bottom line, it's good that he's on the mend.