VisualCode Shortcut to display autocomplete list before typing in MacOS
I solved this problem using fn+control+space.
Hope it helps you.
In case you are a CJK user using Mac, Ctrl + Space
will not work, since it is used to switch IMEs. There is another keyboard shortcut for triggering suggestions: Option + Esc
or Alt + Esc
if you are using a Windows keyboard.
Also see post here.
VS code version: 1.41.1