Hey @pj76422, Thanks for letting me know.
Did you manually provision the user in the AWS SSO users setting with the same Auth0 user to work as mentioned in my previous post?
Following steps needs to be followed to configure the User in AWS:
a. Navigate to the AWS SSO landing page. In the left navigation pane, choose Users .
b. On the Users page, choose Add user .
c. On the Add user page, in the Username field, enter the email address associated with your Auth0 user If you do not use the correct email address, authentication will fail
d. In the Email and Confirm email address fields, enter the email you used in Step C
e. Enter any value you like for First Name and Last Name .
f. Ensure Display name field is populated.
g. Click Next: Groups .
h. Click Add user .
i. To assign the user to your AWS account, in the AWS SSO console, in the left navigation pane, click AWS accounts .
j. On the AWS Accounts page, select the AWS organization tab. Check the box next to the AWS account you want to assign to the user. Then click Assign users
k. On the Assign Users page, find and check the box next to the user you created. Then click Next: Permission sets .
l. Under the Select permission sets section, check the box next to the permission set you want to assign to the user. If you don’t have an existing permission set, click Create new permission set .
m. Click Finish .
Again I apologize this is not in the official documentation, which needs to be added.