The new My Account is already installed in all VTEX accounts pertaining to a test environment, allowing adjustments on the new page to be implemented without impacting user experience.
This means that My Account already makes it possible for your store to customize when needed, before the app's bulk migration to production, through the link shown below:
To customize the page, you need to:
VTEX will migrate the new My Account to accounts on the 12th of June 2019. It is therefore imperative to begin adjusting page customizations now.
Migrations to the new My Account prior to June 12th can be requested by opening a ticket with VTEX support, if the necessary page customizations have already been implemented.