That’s likely true.
The first I heard of Pangolin was in a conversation that followed on from one about head/tailscale and I accept that I may have jumped to a conclusion. I am certain I’ve seen people talking about using it as a reverse proxy tool. Just found a blog post on the tailscale site talking about how to do it and they’re using tailscale and caddy, rather than everything being handled by tailscale alone, so I’ll accept that I’m wrong on this one. https://tailscale.com/blog/last-reverse-proxy-you-need
I’m quite happy with audiobookshelf. Sometimes I’m in the mood to listen to a book, sometimes I fancy a podcast and audiobookshelf let’s me do both with little fuss. (and it has oidc support for authentication which means I now authenticate with my single sign on solution)