According to
https://tvheadend.org/projects/tvheadend/wiki/AptRepositories packages should be provided for 16.04 LTS (Xenial Xerus) but unfortunately I cannot find any
at https://cloudsmith.io/~tvheadend/
curl -1sLf 'https://dl.cloudsmith.io/public/tvheadend/tvheadend/setup.deb.sh' \ | sudo -E bash
Executing the setup script for the 'tvheadend/tvheadend' repository ...
OK: Checking for required executable 'curl' ...
OK: Checking for required executable 'apt-get' ...
OK: Detecting your OS distribution and release using system methods ...
^^^^: ... Detected/provided for your OS/distribution, version and architecture:
>>>>:
>>>>: ... distro=ubuntu version=16.04 codename=xenial arch=x86_64
>>>>:
OK: Checking for apt dependency 'apt-transport-https' ...
OK: Checking for apt dependency 'ca-certificates' ...
OK: Checking for apt dependency 'gnupg' ...
OK: Checking for apt signed-by key support ...
OK: Importing 'tvheadend/tvheadend' repository GPG key ...
OK: Checking if upstream install config is OK ...
OK: Installing 'tvheadend/tvheadend' repository via apt ...
OK: Updating apt repository metadata cache ...
OK: The repository has been installed successfully - You're ready to rock!
sudo apt install tvheadend
No apt package "tvheadend", but there is a snap with that name.
Is it just me not understanding how to install or is the package actually missing?