Not always, for example this laptop has external monitors wired to the dGPU. https://wiki.archlinux.org/title/Lenovo_ThinkPad_X1_Extreme

Jokes aside, you create a custom Dockerfile and copy a statically compiled shell binary.

Synology supports docker containers. Just run jellyfin.

Have you tried kitty? It’s seriously nice if you can live with the occasional “oh no I sshed to a server that doesn’t have the correct terminfo files and now none of the normal terminal navigation features work”