Hello,
I don’t understand the FriendsService.Instance.PresenceUpdated because it never change even if I have a friends who change his status : await FriendsService.Instance.SetPresenceAvailabilityAsync(av);
So how do I trigger it, do I need to make API request every second ?
Regards,
Yeah my bad I didn’t initialize both availibility on players
Yup that would do it 
Just for future references presence updates will only be sent to players that are either :
ONLINE, AWAY, BUSY, INIVISIBLE. Any body who has either not set their status or is set to OFFLINE will not get updates.