@sivananda_reddy - I couldn't find any relevant documentation on the migration but it looks like the AEM Connector you have already built (on AEM on-prem) will need to be changed as per AEMaaCS Best Pracitses and compliances. Here is the document which help you with few of the details: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/connectors/implemen...
Jineet