Jellyfin is generally just as easy to set up for external access. The only thing you really need to worry about is having a dynamic IP. If you have a domain name, then setting up dynamic DNS is quite straightforward.
The only issue I have with people remotely accessing Jellyfin is that you cannot set a total system bandwidth cap. You can set a per stream cap, but that doesn’t help if you have too many people accessing your server at once.