Can't get boss atlas above 8/10

My boss atlas tree appears stuck at 8/10. Is there a way to check and see what requirements have been completed and/or still left to finish? I've done everything that shows in the tooltip at least twice, including killing arbiter.

POE2

From my experience the only reliable way to check is through the Atlas interface itself. I open the Atlas, then look at the Voidstones and the Pinnacle boss indicators. Each major boss tied to Atlas progression has its own visual marker. If one of them is missing, that’s usually the culprit. I also double check Maven invitations and whether they were completed in the correct version, because doing a boss fight is not always the same as completing the exact requirement that grants progress. In a few cases I had already killed the boss, but not in the context that actually counts for the Atlas, so it didn’t register. Logging out and back in sometimes refreshed the state, but usually it came down to one boss or invitation I assumed was done but technically wasn’t.