Hi,
From your description it sounds like the account that you are using for MS Learn doesn't have any paid subscriptions connected to it. What I would recommend is opening a InPrivate/InCognito window, signing in to the Azure portal using one of your other accounts, and checking to see if your subscription(s) are there.
If you are unsure which account your subscriptions are under it might help if you check your various email accounts to see which one contains your Azure invoices/informative emails.
If the above was useful please click Accept Answer.
Thanks.
-TP