Most of the battle royale games usually have 4 players as a squad and sometimes 6 players. But Apex legends have only 3 players in a squad.
Earlier there were discussions to increase the number of players in a squad to 4 but then any such ideas were dismissed by the Apex Legends developer team. So now you have three modes, that are solo, duo, and squad(three players).
cggames Answered question May 6, 2021