I’m not so sure what the playing field will be like going into Episode IX. Kylo can only get so far throwing tantrums at his officers every five minutes without showing some real leadership skills. He hasn’t proved he’s capable of replacing Snoke in that regard yet. (And Luke made him look like a fool in front of a lot of witnesses.) The First Order could be too busy grappling with internal power struggles to pursue the Rebels full bore, which may give them the time they need to find new/old allies and rebuild.