Like I said. So even if someone find your domain to your jellyfin server they would only see Authentik.

And if you start with authentik you could use it for much more self hosted services so you have one big login page in front of your services.

I would suggest to put it behind an sso service like a self hosted authelia or authentik. So even if someone finds your website they will only see your authentication page and not what’s behind it.