Hmm, have you made any changes to the firewall on the system hosting the Docker container?
You might need to edit the firewall with a something like this:
sudo ufw allow from 192.168.1.0/24 to any port 8096
Are you using docker-compose to run the Jellyfin service? If so, you might need to add something like this to the docker-compose.yml file:
network_mode: 'host'
extra_hosts:
- "host.docker.internal:host-gateway"
I’m no expert at Docker or UFW, but these are part of my Jellyfin setup, which I’m running on Ubuntu LTS in a Docker container.
The official documentation has some guides on setting it up in a few different ways, although they assume the user is decently familiar with Linux/terminal commands and such. There might be some more beginner-friendly guides out there, though.
https://jellyfin.org/docs/general/installation/container/
I switched from Plex to Jellyfin a while back and I’ve been very happy with it.