HI,
Do you mean to migrate resources from one Azure AD tenant to Another Azure AD tenant subscription.
Transferring an Azure subscription to a different Azure AD directory is a complex process that must be carefully planned and executed. In some scenarios, transferring a subscription might require downtime to complete the process.
Please refer the below articles for more information and possible services. Please go through and let us know if this something you planning or its different thought ?
https://video2.skills-academy.com/en-us/azure/role-based-access-control/transfer-subscription
https://vmlabblog.com/2020/02/how-to-move-an-azure-subscription/