As a Roblox developer, it is currently impossible to use Players:GetFriendsAsync(Player.UserId) and Player:GetFriendsOnline() when play testing in studio (running multiple client tests)
This means that for me to test with multiple players I now have to actual go out and get a real person to test my game (which can take way too long)
Since studio clients now take on your characters appearance, they should also take on your characters own details (such as their friend lists, etc.)