Disable Engagement Cloud: (dotmailer/dotmailer-magento2-extension)
bin/magento module:disable Dotdigitalgroup_Email Dotdigitalgroup_Chat Dotdigitalgroup_Sms
Added “Dotdigitalgroup_Sms” which is applicable in 2.4.2 onwards. Otherwise, disabling one of Dotdigitalgroup_Email or Dotdigitalgroup_Chat without the others will cause an Exception Error in the backend.