Hi Zen,
It should be on the same Email, weird. Did you check the achievements tab?
You may want to contact the Credentials support at https://support.serviceshub.microsoft.com/supportforbusiness/create?sapId=de16815f-2fa5-576e-4946-70cae21a4eeb for a better answer.
I hope this information helps. If you have any more questions, don't hesitate to reach out.
Otherwise, please take a moment to rate the answer. Wishing you good luck!