It's the same as part 1.5 - 4 Ordeal Calls + 1 Interlude which was the summer event we are going to have next year because it is part of Ordeal Call 3.

I'm still in FGO NA, but I got it through FGO JP videos on YouTube.

The worst part is that I'm worried about what will happen after Part 2.5.

4-5

There were supposed to be 3 (Ruler/Avenger/Alter Ego), MoonCancer had a diplomatic immunity that made them immune to the Ordeal Call, but Nasu got "inspired" so he (once again) retroactively backpedaled and wrote one.

And apparently everyone expect a Foreigner Ordeal somewhere (Might have missed something but as much as it makes sense, I don't remember it being announced or teased anywhere)

(Pretender is supposed to be able to hide their status within other classes and are therefore also not triggering the Human Foundation, but who fucking knows, Nasu will probably go back on his words and give us Ordeal Call 5)