Woops, I almost forgot to brag about this. So here's what a Zap post shared on Facebook looked like:
Notice the title does not appear, only the channel full name instead, there's no excerpt and the profile picture is shown instead of the beautiful one you chose carefully...
And here's how it looks now:
Many thanks to @Mike Macgirvin
for the guidance.
(P. S. : available in dev branch for the moment)