There are several reasons why your score might not show in the addon, but these are the most common:
The player may be running an outdated database. Ensure that they've updated to the latest version of the app.
Your score is not high enough in the current or previous season. We require that players have earned at least 200 points to be included in the database.
You recently transferred or name changed. The addon is updated daily, so your character will be picked up in the next database refresh.
If you do not log onto your character for 7 days, it drops off of our database. You will need to log onto your character and then wait for the next data sync for your character to show on Raider.io.