Hi @Hala Dairy ,
the transfer from an EA Azure Subscription to an CSP Azure Subscription is described here:
Transfer EA or MCA enterprise subscriptions to a CSP partner
Some additional Information you will find here:
Transfer Azure product billing ownership to your Microsoft Partner Agreement (MPA)
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten