/brteams
Battle Royale teams before it starts (whoever loaded it, or a Host): /brteams solo, duos, squads (4) or auto (solo under 4 players, duos under 8)
In the game
Usage: /brteams <solo | duos | squads | auto> (auto: solo under 4 players, duos under 8, else duos or squads)
What it does
Not explained in detail yet.
Wiki