Due to the API change made during "Kick It Up A Notch" on JP in 2023, there's no way to track anyone beyond T100 with the new ranking leaderboard API version 2 they had made, so this notice is there in advance in the possibility that EN will implement those change too.
Of course, there's no way to tell for sure until the update comes, EN's track record of following JP's API backend hasn't been very solid so there's a chance this feature will stay.
This'll affect the following commonly used API features :
Check if Amia is appearing in the Discord user list, if the bot is not in the user list, it's likely that the bot isn't given the permission to send a message in the channel.
Nope, there isn't any command that utilize the linking feature as of now.
You can stack > in the player-id parameter and it'll scroll to the next page, up to T100