Many Open Graph tags are already added by the Webflow designer, if you make use of the SEO features.
For example;
All of these are accessible under the page-level settings.
In your Site-side Custom Code, in the HEAD area, I'd add these;
<meta property="og:site_name" content=" YOUR SITE NAME HERE ">
<meta property="og:type" content="website">
Set the content attributes to match your needs. Site name should be short, clear, and to the point, no added text. These will appear on all pages, which is exactly what you want for these two tags.
NOTE: I am testing this, based on the observation that some sites do not show a site name in Google search results.
For example, as I'm writing this, Sygnal's site just shows the domain sygnal.com at the top of the result.
Most of my client sites do show a legitimate site name, which is different from the home page <title>.
However, I've setup most of my clients with Google Adwords. There may be a connection there.