If you're unaware of it, might I introduce you to the Challenge Log?

If you are ... SE could pretty easily just add some more stuff to it. Or boost the XP from what's in there now; it's gotten pretty lackluster with recent scaling, at least above level 80.

... also, none of it is exactly needed. Everyone who went into Endwalker with 80s by now likely has every class they care about in the slightest to level 90. And some of us no-lifers (myself included) are starting to hit 90 on absolutely everything.