I'm surprised nobody mentioned that Maho didn't even try to activate the teleportation monument to see what it shows for her.
Maybe the level 1 teleport is always available, or for her it would be a special exception, like with being able to unlock the doors from the wrong side.
I reckon it'll be shown in the future that this is not the case and she really only has level 95 as a teleport location, but the artist really should've shown them trying out this possibility. Instead it just looks like they both stupidly believe what Fiona said without confirming it.
Edit: Wao, I just checked out
the WN translation of chapter 23, which corresponds to this manga chapter. Spoilers (maybe, because it could've changed significantly in the light novel and subsequent manga adaptation) ahead:
It's basically the same as this manga chapter, but instead of Fiona leaving right away, they actually check what the monument does for Maho, like I mentioned and was the logical thing to do.
And it turns out she's able to teleport to every fifth floor, plus the floor of her home centre. They try the first floor and are able to get out together right away.
So, it seems we're getting a
swift reunion after the fakeout separation next chapter.