So, maybe I'm just a little blind and can't find it, but is there no 'Main Scenario Mode' option for the new level 80 Dungeon, the Grand Cosmos?

Whenever I open my Trust window, I only have access to the 'normal' mode of Trusts. No problem, I thought, I still have 3 Trusts that aren't 80 yet, maybe it will show up then.

But now I had to read on reddit that someone has the Main Scenario Mode only up to the level 75 dungeon. I know that reddit isn't really reliable, so, could someone (with all Trusts to 80) maybe confirm or debunk this?

Should it really be true that it isn't available per Main Scenario Mode, it would be quite the bummer. I ran the dungeon with friend, since the Patch Notes made me believe it would be possible to relive the first run Trust experience later. Especially a certain character that isn't part of the Trust Roster we can always access.