It appears that Plex has been ignoring this request, but the time to implement ATSC3 is here. HDHomeRun supports it, and many stations are now broadcasting it. Yes, some are encrypted with DRM, but many are not (yet). One of my local stations is very weak on the ATSC1 stream, but ATSC3 comes in just fine. However, it looks like Plex can’t handle it. All I get is an error message saying “Could not tune channel (No parts)” on the web player and “There was an error while attempting to tune the selected channel” on Android when trying to view live TV. So to avoid creating a separate post for that, I’m casting my vote here.
There are other posts about the same issue that have received no response:
Been using Plex for years and now am really regretting my decision to purchase the lifetime Plex Pass. At the very least, we should be able to get a response out of someone.
