Serve your site as pre-generated static assets, but personalise them with minor modifications as their HTTP responses flow through the edge network to the client.
Sounds hard.
Made easy.
@whitep4nth3r demos this wonderfully. From the ground up. https://twitter.com/whitep4nth3r/status/1558037403448877059
My tweets and posts live here on my own domain these days.
You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.