Actually, file sharing in Garuda is pretty simple. Samba, NFS and FTP shares can all be configured easily with the standard Garuda tools.
The question is whether your TV is able to access such shares. Considering that all these technologies have been around for decades now, it would be not understandable why not.
However, I had a similar issue with our Samsung Smart TV. In addition to that, Samsung is pretty bad in keeping its OS up to date, so over time more and more built-in apps stopped working.
My solution was to connect a Pi3 with Kodi on LibreElec and use the TV just as dumb TV.
If you aren't familiar with these: