Just checked the PS store, and there it shows as "Purchased" with a "Download from library" link (which of course, leads to a download page to your entire library that doesn't make any sense or offer any filtering, because it's Sony with their websites). Then turned on the PS5, where it indeed shows that it's no longer available and I should purchase it.
Sony, get your shit together. Your websites suck ass, and not in a pleasant way. But I'll definitely check this out, especially if there's a sale at some point. For now, waiting about 12 hours to get to something that starts with an "A". And ends with "stro Bot".