I was wondering if I could get some insight from anyone who could help? 
A friend of mine had a successful CBD brand,  has all the necessary licenses and certifications to sell legally around the world.
We are looking to start a listing on Amazon, but we know it’s a gated process and there is an invite only scheme going on in order to create a listing.
Does anyone here know how we could create a listing on Amazon or if anyone has advice on who I could contact to set this up?
I have worked with clients selling CBD products in the recent past. What I would say is that amazon are very against it in general. Since you’ve not already started selling, if you’re going to start a brand on Amazon, I would recommend against CBD and considering another product idea. Not that CBD won’t work, but it will be a very steep uphill battle!