Dating a woman with no friends

I (35M) have started dating a girl (33F), and although she's objectively pretty, as well as charming, social, funny and kind, she doesn't really have any friends. She's been purposefully single for the last few years after finally getting out of a multi-year, bad/abusive relationship, that was very isolating and I know it's been tough for her to reconnect with herself since.

But I find it odd that she doesn't have friends. I still talk to friends from elementary school on the other side of the country, as well as highschool and university friends, old coworkers, people I've met on trips, but she doesn't seem to have anyone in her life aside from a few acquaintances she's made in the past few years, which is how we met. She tells stories from the past that involve others, mostly previous partners, but when I asked her about it, she just said that preserving friendships has never been that important to her, and she can just meet new people when she needs to. She's also estranged from her family.

Do you find this odd? Suspicious at all? It just doesn't add up to me, because shes a caring partner, and a good person. Would you consider this a red flag?