First picture is from my Azure Active Directory. As you can see email id is set and manager is added for the particular employee. Still in PowerApps it shows manager not found. Any idea?

First picture is from my Azure Active Directory. As you can see email id is set and manager is added for the particular employee. Still in PowerApps it shows manager not found. Any idea?
You need to use an internal email for the user in Azure AD. It can't be a gmail.com account. You are actually using the User Principal Name when looking up the manager, which is normally equal to the email.