Seems like Moore made it clear he's no longer interested now that they have Carr &/or the staff decided with Carr in the fold it's time to open up 2023 QB recruiting, which may have been the deal breaker for Moore.
Based on what LAX said, it sounds pretty mutual. ND was looking for a commitment sooner, they didn't get it, timeline was going to be stretched further, so they focused hard on 2024 and are deciding to cast a new net on 2023 with after landing Carr in '24.
I'm perfectly fine with this supposed scenario. Moore was trying to have his cake and eat it too, and the staff finally had enough.