How do I embed a SmartSheet into a Confluence page on Confluence Cloud ?

How do I embed a SmartSheet into a Confluence page on Confluence Cloud ?

 

This link seems to be ONLY for old Confluence 'on premise' versions:

How to embed Smartsheets in Confluence using the HTML Macro | Confluence | Atlassian Documentation

 

Requirement: I need to embed both a SmartSheet Project Plan and a Smartsheet sheet into a Confluence page so its dynamically displayed / updated.

 

Larger / more general requirement: How do I embed a web page in Confluence ?

Answers