The following data gets synchronised into your MailChimp account,

• Customer Information

  • Email Address
  • First Name
  • Last Name
  • MRR

• Subscription Information

  • Subscription handle
  • Plan Code
  • Plan Name
  • Subscription Created At
  • Subscription Status
  • In Trial Status
  • Trial End Date
  • Cancellation Reason

Refer here to know more about data sync.