Here's probably the most idiomatic Nix code for what you're asking. Noogle is your friend for finding library functions.

• https://noogle.dev/f/lib/concatLists
• https://noogle.dev/f/lib/optionals

{
  rightModules = [
    "group/expand"
    "wireplumber"
    "network"
    "privacy"
  ]
  ++ lib.optional components.bluetooth "bluetooth"
  ++ lib.optional components.battery "battery"
  ++ [
    "custom/wlogout"
  ];
}