PWA + Official AMP

This one: https://www.ads-software.com/plugins/pwa/

The AMP plugin directly supports it, and I am one of the maintainers.

Ah ok, I thought this was the framework for those that have built there own PWA.

Link to a good tutorial on setting this up after install? Like styling, setting icon, etc…?

Documentation is currently in the project readme: https://github.com/GoogleChromeLabs/pwa-wp#description

This is an extension plugin for configuring a common network-first caching strategy: https://gist.github.com/westonruter/1a63d052beb579842461f6ad837715fb

The icon re-uses the Site Icon. It reuses existing WordPress settings whenever possible.