Lalafell and Dwarves... Plot Hole Potential?

[MikkoAkure]

From the Shadowbringers website:

This insular tribe dwells upon Mt. Gulg in Kholusia, its diminutive people rarely leaving the community of their birth.

I guess Lamimi is one of the rare ones, like how male miqos are supposed to be rare but you see them around as adventurers. She only joined up with the future warriors of darkness because she found Arbert dying in a ditch and saved him and fell in love with him so it still works out. Also, as the others said it looks like you missed the picture they posted during the live letter that's also on the website of a dwarf with no helmet. This brings us to your number 4 option:

Female Dwarves/all Dwarves actually look exactly the same as Lalafell, and only some can grow facial hair.
Again, I'm confused about this if Dwarves are never without their beards. Do female Dwarves just have fake beards glued to their helmets? They did mention (albeit somewhat jokingly) that under a Dwarf helmet was a Lalafell. Maybe this was meant more seriously than what was originally let on.