Answers to your questions
What version of LibreELEC do you have installed.
*LibreELEC (official):9.2.6 (Generic.x86_64* )
What version of TVH server addon is installed.
*TVheadend 4.2 server*
What type of tuner are you using with the Chromebox ie DVBS or DVBT or DVBC or something else.
*HDHomeRun Extend (ATSC-T). Two tuners on same network. I get 73 channels and they viewable through HD Home Run app or VLC on TV as well as mobile devices.*
What region are you based in.
*Hartford, CT USA* .
After you finished scanning the muxes I assume you are then mapping the services that should be present after the scan.
*Yes. It doesn’t find any service to be mapped. See attached screenshots.*
The more information you can supply the better. No need for a new post.
*See attached files for more details.*