An easy way to include a systemd service template in the qbittorrent-nox package would be adding the option --enable-systemd to the configure command.
This can be accomplished by changing debian/rules as per the attached diff. IMO the package qbittorrent-nox should indeed provide such a launcher because its main use is running in background controlled through the WebUI. This service template is moreover harmless for users who don't need it since it wouldn't be enabled by default. BZ
--- orig/qbittorrent-4.4.1/debian/rules 2022-02-18 11:25:39.071956171 +0100 +++ new/qbittorrent-4.4.1/debian/rules 2022-02-18 11:02:06.895993681 +0100 @@ -8,7 +8,7 @@ override_dh_auto_configure: dh_auto_configure --builddirectory build-nox -- --disable-gui \ - --with-boost-libdir=/usr/lib/$(DEB_HOST_MULTIARCH) + --with-boost-libdir=/usr/lib/$(DEB_HOST_MULTIARCH) --enable-systemd dh_auto_configure --builddirectory build-gui -- \ --with-boost-libdir=/usr/lib/$(DEB_HOST_MULTIARCH)
