To view the Discord UserID stored in Metafields on the Shopify Customer Profile Page, please follow the below-mentioned steps:
1. Go to Shopify Admin Dashboard > Settings.
2. Click on Custom Data and select Customers under Metafieds.
3. Click on Add Definition.
4. Enter any Name and description of your Choice. Now Select type and choose Single Line Text.
5. Now click on Save.
You should now be able to see the Discord UserID on the Customer Profile Page.