I'm not sure it's referencing any actual Facebook posts by the Trump team. It's discussing the protest of the FB employees with respect to Zuckerberg's statement that FB--as a policy--would not label/block posts as Twitter has done.
So it's a virtual walkout to protest Zuckerberg's policy on something that's never going to happen? (Guess we could all use a good chuckle about now...)
It _is_ happening. That’s the impetus.
I'm referring to Trump posting on Facebook. If that's happening, it's news to me.