How to retrieve your UID and server:
Open Honkai Star Rail;
Your UID is displayed in the bottom left corner of the main screen;
Your server (America, Europe, Asia) is linked to your UID.
How to redeem:
Open the Honkai Star Rail top up page;
Choose the Oneiric Shard package;
Select a payment method;
Enter your UID and select your Server;
Complete the payment;
Wait for the shards to appear in your account;
If missing, restart the game.
Redeeming Primogems on PlayStation and Xbox
If you play Genshin Impact on PS/Xbox, follow the steps below to redeem your Primogems.
Download the Genshin Impact app on your mobile device;
Log in to the game on your phone with the same account used for your console;
Exchange your Genesis Crystals into Primogems on your phone;
Go back to the game on your PS/Xbox, and your Primogems will be there.