I assume with the catching up Year 6 isn’t available yet, but is there a way to preorder it through demiplane? My group is looking to run the first adventure on the 15th September, and I’m hoping not to need to buy it twice (on paizo first).
Hi there Raegnis, welcome to the forums!
No pre-order at this time, as we’re not 100% certain when we’ll begin our support for Year 6. We don’t want to ask for your money until we’ve got that locked down. 
Once we’re able to start our support, we’ll get all of the Year 6 adventures loaded in up to that date, and then continue with our releases striving for day-of support for the rest.
Love that you want to grab them here on Demiplane, and hope we can support you doing that soon!