Similar to how JAMStack deployment services Vercel, Cloudflare Pages, Netflify, etc., have preview deployments on pushes to branches on Github. Preview deployments allow the ability for QA to just test a snapshot of a specific branch that could be a new feature, for instance.
Similarly, Builder could have a separate option for "view current draft" that would actually be a snapshot of the whole site, rather than just a single page. This would be amazing for QA.