Ideally the goal here is to use azure ad and SAML for a single sign on to APIGEE edge, rather than using APIGEE OpenId, for authentication to the Enterprise UI. If anyone has tried this or has the details can you share them?
So you want to setup SSO where your IDP will be Azure AD & your Drupal site will be the SP, right.
In order to make your site as SP you will need to download simplesamlphp module with the required vendors.
composer require drupal/simplesamlphp_auth:4.x-dev drupal/simplesamlphp_custom_attributes --prefer-dist
Please follow these 2 steps
Further you can follow steps from this site
Please try, if it this does not helps let us know with the specifics you need.
Thanks!