Clarification on Email Sequencing Integrations and Package Limitations

Quick question: Email sequencing Integrations are marked as only available in the Explorer package. Does that mean we will NOT be able to push any of the emails crafted in Clay directly into Instantly/Smartlead? Or does it mean that you will be able to push the first email, but not the entire sequence? Also, are CRM integrations, like two way integration with Zoho not available in the Explorer plan at all?