This is bad news. FAST streaming is an ad-riddled nightmare. VLC already supports streaming video just fine. Native support for FAST services just means native support for ads.
VLC already includes support for IPTV streams and M3Us. If you want to load FAST channels, you can do that now using a playlist from here: github.com/iptv-org/iptv
You’ll even get an ad-free / ad-reduced experience this way. FAST providers like Pluto and Tubi rebroadcast some TV channels and inject their own targeted ads. If you pipe the video stream into VLC, you’ll just see “commercial break in progress” filler video instead of commercials. Try it out with a local news station, they are all almost completely add free this way.