OK so yes SVU has dipped into popular nerd culture AGAIN with a vtuber episode (S27E16):

I watched the first 5 minutes to see what the premise for this could possibly be - basically what happens is that the vtuber opens up to having been raped on stream, NYPD gets involved after fans take it into their own hands to harass and attack who they believe is the rapist, and SVU has to figure out the irl identity of this vtuber to continue the investigation. That's as far as I got, but from what I've read online it seems like they find her pretty much immediately and it's basically just another SVU episode with nothing to do with vtubers besides the initial prompt.

There's a clip of the vtuber portion on twitter here, which includes this amazing quote:

"I've never actually met her, I don't know her real name. She's a vtuber on Twitch"