If you have verified that it is the right account but it still doesn’t work you can visit this link on the Dexcom website. Login with the same account and then verify that “Steady Health” shows up under “Authorized Third Party Applications”.
If it shows up, you have connected the right account.
If it still does not work, the last step is to login to Dexcom Clarity and see if you can see your data there.
Please share if you can see your data in Clarity with our Care Team and we will help with next steps.