From my reading it sounds like her girlfriend Kaidi is under house arrest, and potentially both of them under surveillance. I'm guessing frequent checkins with the local police. Hope I'm not misinterpreting.
Article also notes her historic calling out of potential keyboard app keystroke siphoning threats in China could be related. Sogou input recently found to transmit every keystroke by Citizen Lab.
I don't think she meant her girlfriend is under house arrest (though possibly too), I guess she meant she can leave the country but her girlfriend can't.
Uyghur are systematically suppressed and discriminated in China. It's very hard for them to get even a passport, let alone be allowed to leave the country legally. Given the situation of Naomi now, it's practically impossible for Kaidi to leave China.
Article also notes her historic calling out of potential keyboard app keystroke siphoning threats in China could be related. Sogou input recently found to transmit every keystroke by Citizen Lab.