She isn't that good. She is sort of someone who stuck around the UFC for a long time. I don't think she is much of a threat to Nunes. The 135 division really stagnated for the past few years. They haven't really signed any new talent for that division in a while. I don't even think it's a UFC thing. There is no BW division in Bellator. Some of the mainstays from the UFC left or aged out. The ones that are left are about to age out. Aspen Ladd was supposed to be one of the newer talents but was with the promotion in 2017. She is now cut.
Ronda can probably still come in that division and beat a contender to get a title shot. Pena did it by beating Mcmann who I am not sure was ranked at the time or not. Germaine is most likely retired since she got pregnant.