Wrestlemania going to two days also put a damper on it. When I went to WM 34 in New Orleans in 2018, there were shows at all times from Thursday night to Sunday morning. Now, it looks like the decent shows are on Thursday and Friday, which sucks for the promoters, because I would have to imagine that most people are showing up on Friday. Then you’re competing with NXT on Saturday afternoon. It’ll be hard to put a lot of butts in the seats unless your a big indie company
This is the answer. Before, you just had to navigate around the main show on Sunday, and maybe NXT in Saturday. That usually left promoters with all of Friday night, maybe some Friday afternoon stuff, most of Saturday night/overnight, and then Sunday morning.
But now, there's just not enough time that doesn't have a WWE show running to really warrant the array of shows there were before.