Currently exploring using 11ty to build a single page admin/posting interface wired up to a Cloudflare Worker. Protected using Cloudflare Access. Netlify’s Idenyity is deprecated, everything I’ve looked at requires GitHub account for auth.
Netlify Identity. I finally looked at DeCapCMS and everything sounded great until discovering no way to post without user having GH account. For when you don't need a fancy posting UI.