The story goes that Mori was acting according to World of Darkness' Tos so she thought it would be fine, then someone at Cover pulled the plug at the very last minute because in Japan, they need explicit permission to run copyrighted IPs if it's monetized in any way, and then WoD said "Yeah, just do it" because American IPs aren't usually very uptight when a larger content creator wants to basically advertise for free.It was Cover being incompetent idiots and told Mori in a last minute that she would not be allowed. Then in a middle of stream she gets a message that it is fine and Paradox will send her and other ENs some other accessories.
Cover also did a similar thing with Undertale, Cadence of Hyrule, and countless other smaller indie devs and they were all like "Oh yeah, do it and we'll also make content for you"
Meanwhile in Japan, Konami and Atlas are blocking Calli from playing Castlevania and Persona, her two favorite series.