Thank you for your question and reaching out. I can understand you are having query\issues related to Azure AD transfer.
Transferring an Azure subscription to a different Azure AD directory is a complex process that must be carefully planned and executed. Many Azure services require security principals (identities) to operate normally or even manage other Azure resources.
I would suggest to Consult to Azure support or your Azure account manager before switch of a subscription.
--If the reply is helpful, please Upvote and Accept as answer--