My translation is in french so yeah ( from my understanding vshojo managenement didnt let her play the wizard game?
"Yesterday on stream I said that I would play Harry Potter, but management got in touch and it turns out it's NG. Sorry about that."
Other Vshojo members have said management advised them not to stream the game, but it wasn't a binding order or anything. Silvervale just happened to be the only one who decided to do it anyways. No clue if that's consistent with the JP side, though.
This is also the right decision at the moment, considering yesterday. Most Japanese vtubers are spared by the mob, but Pikamee got backlash due to her prominence in the EN sphere and I think Nazuna being connected to Vshojo and the Silvervale drama would make her a target as well. Not to mention her psycho antis being willing to take any opportunity to attack her and joining in with the mob.
Nazuna absolutely would not be able to handle the potential harassment right now on top of all the other shit she has going on.