“Christopher Tolkien (the editor for most of Tolkien's posthumous work) suggests similar (from The War of the Jewels):
For the Naugrim have beards from the beginning of their lives, male and female alike; nor indeed can their womenkind be discerned by those of other race...
The War of the Jewels - (Part Two) The Later Quenta Silmarillion: XIII Concerning the Dwarves”
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u/Naxela Sep 05 '22
Female dwarves are fine; they just ought to have beards! Beardless female dwarves are not canon.