Has their own sidebar
Whether a flow has given a player a sidebar of their own.
A Minecraft element (a check) in Scoreboards & teams. Needs the Basic plan or higher to go live; building and testing are free.
Example
When a player joins → If Has their own sidebar is false → Set sidebar lines: Welcome.
Also called
has sidebar, sidebar shown, has scoreboard
Works as a data pack?
No. This one needs the Elementium plugin on a Paper server.
What you give it
- Player