QR code provisioning - Run OEM Wizard

Hi, 

I've got a device owner app I've written, it's working well when I install it via a QR code, but I want the stock Pixel / Moto setup wizard to run during / after the device owner setup wizard.

I've done quite a lot of research, this doesn't appear to be easy!

Any pointers / leads in the right direction to how I might achieve this would be greatly appreciated. Methods, source code to read, etc.

Thanks,

Richard