Edit :
After a little research.
The request exist in the ‘wp_bp_friends’ table on my database (good initiator_user_id and friend_user_id, is_confirmed at 0 and is_limited at 0).
And, on my template, the `if ( bp_has_members( ‘type=alphabetical&include=’ . bp_get_friendship_requests() ) )` return false, while the function bp_get_friendship_requests() returns well the id of the membership who made the request…