Yes. I added it as a source, it shows 243 channels, including Ion+. It doesn't say "signed off" like before with a different source, but no guide data.
Strange. I see listings for it in https://i.mjh.nz/SamsungTVPlus/us.xml
It works with Plex TV.
edit...working with the correct Samsung epg! From here:
Samsung TV Plus for Channels - Playground / Custom Channels - Channels Community (getchannels.com)