Femininity should never and does never mean damsel in distress. That is just a trope, I hope, we will get rid off soon.
Vulnerability is one of the aspects of femininity though. Negative aspect, but still.
It's a verytraditional worldview, that does not hold much truth. Gladly in modern media the vulnerability and damsel in distress trope is used less and less. I think in BG 3 they do a pretty good job with the female companions so far in that regard (in other games too). Ironically I can't say much about Minthara, I only watched her scenes on YouTube, but she doesn't seem fall into that trope either.
I didn't want to get off the trail with the alignment discussion, which seems to be pretty lively atm.
I think to not give the companions alignment tags is not a bad thing. Let their actions speak for them.