OK, dug in a little bit. Gable already lost the qualification back in 2019 to be the US men's representative at heavyweight for Freestyle (125kg weight class). He does not wrestle the Greco style, only Freestyle.
Lost two matches to Nick Gwiazdowski, who was a two time NCAA champion (2014, 2015) at NC State, and then was runner up in 2016 to a guy from Ohio St who went on to win the gold medal at Rio in the next weight class down (97kg).
Unfortunate thing is, Gable has since beaten Gwiazdowski in a Freestyle match, in 2020. But that doesn't change the Olympic team.
So maybe he'll give it another shot for 2024. But for now, there is no further path forward to earn a living with amateur wrestling.