Hmm. Not sure what you were using, but the default REGIONS has been all since the last docker image update in August Samsung TV Plus for Channels which is also the last time the playlist changed (from .m3u to .m3u8).
I set the env var REGIONS=us in my Portainer stack when I updated back then.
I didn't have to change the playlist url, just the epg url for this update.
I never set a region in the URL, and it only pulled US.
192.168.0.xx:8182/playlist.m3u8
Must have been using a older container then? idk
I'm with you, @speedingcheetah; this was the first time I had to put the region code in, was a little surprised to see it. Not a big deal, easy enough, but I'm pretty sure I've been up to date this entire time.
Was announced in the old topic thread here Samsung TV Plus for Channels [retired] - #383 by matthuisman
Another Project One-Click update needed for the custom M3U channel settings, epg url changed.
And the default REGIONS changed from us to all.
the default region changed from us to all last week.
Samsung TV Plus for Channels has been updated.
You can either add the docker environment variable, or use the url like this: /playlist.m3u8?regions=us
I would like to suggest people look at Samsung India source and consider adding it as it has many English Pay cable channels Not available on any other fast services giving unlimited connections that helps add quite a few pay cable channels lightening the load on the slots as many tve providers limit number of connections. Very helpful especially if you have a lot of clients 
Thanks for pointing the way. In an update to bnhf/olivetin:latest (aka bnhf/olivetin:2024.11.08), pushed this morning, the epg URL has been modified. I was already using the environment variable REGIONS, with us as the default -- so I believe the other change is covered.