Besides:
If you do not want automatic updates, but just automatic removal of unnecessary software including kernels, you could have 'Download and install updates automatically' set, but edit /etc/apt/apt.conf.d/50unattended-upgrades to have only comments within Unattended-Upgrade::Allowed-Origins section.
Besides: apt.conf. d/50unattended- upgrades to have only comments within Unattended- Upgrade: :Allowed- Origins section.
If you do not want automatic updates, but just automatic removal of unnecessary software including kernels, you could have 'Download and install updates automatically' set, but edit /etc/apt/