What to expect?!

My husband was chaptered our the army in 2018, he’s working on getting back in this year. He was chaptered out for failing his PT test, all he has to do is pass his next PT test and then they’ll work on getting a waiver for him to get back in. If his old MOS 92Y is available he can keep it. If not he has to fill whatever position is in demand. For example 11X which is infantry. Can someone tell me what I can expect? How long will it take for him to get back in? How long will it take to get a waiver?