Hello @Iuliia ,
Thank you for reaching out to Microsoft QnA Platform. I would like to confirm that as of today changing the country or region for an existing account is still not supported. As an alternative/workaround you can create a new account in a different country or region that you want and then contact Azure support to transfer your subscription to the new account.
More information available on following article: https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/change-azure-account-profile#update-your-country-or-region
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