Why are UFC Fight Night full events no longer available on ESPN+?

I'm a long-time UFC fan and have been using ESPN+ since it launched and became the place for UFC content. This year something seems to have changed: UFC Fight Nights older than few weeks are no longer available. The individual fights are available, but the full 2+ hour events are not coming up in search.

For example, the May 18th UFC Fight Night: Barboza vs. Murphy full event does not come up in search. The individual fights do, but not the whole event. Same for the UFC Fight Night: Cannonier vs. Imavov June 8th event (search results here).

UFC Fight Night: Cannonier vs. Borralho from August 24th is the oldest event that is in the "On Demand" section of the Apple TV app or in the ESPN+ search results for "UFC Fight Night".

I've contacted ESPN support several times about this issue, and each time they try to search for them and are baffled that they can't find them. I am in the USA if that matters.

So, does anyone know if the UFC or ESPN+ remove UFC Fight Night full events from playback after a few weeks?