Gender locked race?

[Hunky]

time to be a fun-fact police and say "Well actually lionesses can grow manes." It's just kind of a thing that happens.

That's true. There have been lionesses that grow manes.

If there were to be female Hrothgar, then of course they'd probably have access to all the current female hairstyles (including the long ones). Perhaps then that line of "majestic mane" would apply as well.