Tried it and it was a breeze to set it up with Caddy!

Problem was… lack of client side support, specially on mobile.

Many (most?) client apps don’t support it.

Use the PWA from your browser, you said? I hope you like Google and using Chrome, because Firefox for Android doesn’t support it 😭

I haven’t watched the video yet, but it’s generally not worth the hassle of setting up mutual TLS if you’re already using a peer-to-peer VPN like Tailscale, as the VPN software is already doing mutual authentication.