I have already checked through the existing feature requests and found no duplicates

• Yes

Is this a server-specific feature?

Not server-specific

What do you want to be added?

Hi! I'm a big fan of the visualizer (as well as the visualizer in stuff like itunes), I like connecting my steam deck running Feishin to my TV and it'd be awesome to have the visualizer running fullscreen (Specifically the butterchurn ones).