Feed back from one of our members who found a unique way of getting pages to show up if they don't. 

I have finally found a way to get my new page show up on my list of available accounts for Facebook.

I had to go into my Business Integrations on Facebook, go into settings, remove SPM from my integrations and then re-add it and reset everything. All the settings were the same as before but for some reason the new page showed this time in SPM.

Thought I would let you know in case anyone else has this issue. Tell them to try this.