TV manufactures are known to slurp up all this data while also providing these apps on underpowered systems. Many techie's recommend hooking up an external media box to your TV and not providing internet directly to the tv.
Huh? I find Infuse to be a very solid tvOS/iOS client, and they added built-in support for Jellyfin over 6 years ago [0]. It's right there at the bottom with other media servers they support (Emby & Plex). What's your issue with it?