Out of IFCA's hands. I am sure that the players mentioned were invited, but their college coaches didn't/wouldn't let them play. To be honest, it was good to see the players who were on the field Friday night.
BTW, some players on Friday night did all they could, to get on the field..., see https://www.jconline.com/story/sports/2019/07/13/healthy-kyle-hazell-makes-big-impact-north-south-all-star-game/1707069001/