Hi @drmattcrooks - we ended up getting help from the folks at Natively.
But in the end it came down to a few things - all app store setup related.
Play store needed to go through closed loop testing first, required updated screenshots.
Apple connect was missing tax forms from the client, needed links to the EULA t&c’s in app.
So all in all, was just a lot of setup stuff, not so much issues in our app.
Hopefully the will be a way to make some of this stuff easier when native mobile gets rolled out fully.