Update: if I include a Server Connect -> Server Action on the layout page just under all of the Server Side Data (template variables I created), then I can populate the available META TAGS that Wappler offers. I needed more META tags then what Wappler offers so I followed the syntax and created additional, valid META tags. See my previous screen shot of my layout page.
Following the tutorial: Sever Side Rendering with NodeJS it led me to believe I could use Server Side Data (variables) for the META TAGS, and provide values to the Server Side Data variables from the content page. This should have had the effect of updating the META tags within the HEAD tag on my content page. It did not.
The syntax that Wappler uses to populate the template variables, in this case 'og-type', does not work.
<meta property="og:type" content="<%=_['og-type']%>">
I've tried several different syntax to get at the value of 'og-type' with no success. Why is it that I can create a SERVER SIDE DATA title tag and update it from my content page, but not create a META TAG and update it from my content page?