Also, will the continental championships earn any FIVB ranking point? As of now they don't.
As of now, Fivb hasn't updated world ranking since July 2017. So I guess, they still don't know what to do exactly. Giving world ranking points for an invitational tournament like VNL sounds a bit shady to me, so i could see a reentry of continental championships. But as its the FIVB, it will most probably stay like this.
A projection on the world ranking after WCH, compiled by our fellow user Brahmin, can be found on Volleymob site.