I already figured that out months before she officially confirmed it. No way a woman her age would be able to afford the expenses (such as trips to Japan) and manage the responsibilities she has (such as caring for two dogs), while being single, let alone a small streamer. It's a little obvious she's getting help in affording that stuff, from someone like her boyfriend (most likely). Plus, she did state that she wouldn't date her fans in the Q&A before that one, and she has been warning her "chuuzers" that they might be disappointed if they meet her IRL-the delulu chuuzers might learn she's not single the hard way, by also meeting her boyfriend with her IRL.
As someone who enjoys watching Nyaru, I strongly dislike her roleplay, ASMR, and "VRchat date" content. My biggest critique of her is that while, she isn't a "girlfriend experience" creator, she does make content that's borderline GFE, then she's gets concerned about her fans having a secret crush on her. I understand she wants to make whatever content, but she needs to be very careful, especially given that she does IRL meet n greets. Of course as suggested earilier, her BF being present with her at the IRL meet n greet, would absolutely deter the parasocial simps (I don't know if her BF goes to cons with her, for security and deterance purposes, since I never actually met her IRL).