Hi, @geoff.talbot Welcome to Builder.io Forum. Thanks for this question!
Response 1#: You can access content input on the server side by accessing the state. Currently, it looks like we have a potential bug around the access state server side and we have created a Jira ticket(ENG-3072) for our dev team to take a closer look into this. We surely keep you updated on this.
Response 2#: You can preview content in the Visual Editor, but you won’t be able to view the draft until your Builder space is integrated properly with your site or app. For more information on how to integrate with your site, please check the documentation below:
Let us know if you have further questions!