To manage voice chat options for your party in Fortnite, follow these steps: 
  1. In-game, select the social menu icon in the upper-left corner of the Lobby.
  2. Select PARTY UP.
  3. You can then select party members individually to see the available options.
Options:
  • You can control your party in a number of ways: PROMOTE a party leader, KICK party members, or even BLOCK players completely.
  • You also can ,MUTE players in the party so that you do not hear them through voice chat.
  • WHISPER to a player in your party to talk to them privately.
To manage your party options in Fortnite, follow these steps: 
  1. In game, select the social menu icon in the upper-left corner.
  2. Select the cog icon.

Options: 
You can change the status of your party between PUBLIC, FRIENDS ONLY, and PRIVATE. This allows you to control who exactly can access the party.