I downgraded gnome-control-center in my Cosmic installation to version 1:3.28.2-0ubuntu0.18.04.2, and then Intelligent Pinyin was shown as one of the Chinese input source options as expected. So item 2 above is most likely a gnome-control-center issue.
Assuming for now that the main issue is an installer problem.
I downgraded gnome-control- center in my Cosmic installation to version 1:3.28. 2-0ubuntu0. 18.04.2, and then Intelligent Pinyin was shown as one of the Chinese input source options as expected. So item 2 above is most likely a gnome-control- center issue.
Assuming for now that the main issue is an installer problem.