◇ Could this help me?
Yes. Missing Open Graph and icon tags are a genuine and extremely common gap in generated sites, and fixing them is low-risk, entirely reversible, and improves how every shared link looks. Treat the specific click-through improvement figure quoted as marketing rather than a measured result, and note that the free published tag references are enough to do this without anyone's private prompt. This is a general practice.
Audit the index.html in this project for missing metadata and report before changing anything. Check the page title and meta description, Open Graph tags for link previews including image, title, description, and URL, the equivalent card tags for other platforms, favicon and app icon links, the canonical URL, and the language attribute. Tell me exactly which are missing, what image dimensions I need to supply for each, and then write the tags once I hand you the images.