At Players | Documentation - Roblox Creator Hub there are 4 fields documented (“Id”, “Username”, “DisplayName”, “IsOnline”)
The function returns “FriendPages” (FriendPages | Documentation - Roblox Creator Hub) instance, which only has 3 of them documented (“Id”, “Username”, “IsOnline”) - the “DisplayName” is missing.
On top of that - the FriendPages object also contains “AvatarFinal” and “AvatarUri”, which probably aren’t so important to document as they don’t seem to work (Uri is blank, AvatarFinal seems to always be false).
Would create a merge request but updating api reference doesn’t seem to be possible yet.
Page URL: https://create.roblox.com/docs/reference/engine/classes/FriendPages