Sailfish X license from Jolla allows for installing the flashable image of Sailfish OS on any number of Sony Xperia devices. Furthermore, the license makes the so-called licensed content (*) available in Jolla Store, allowing to download and install them.
The license is tied to Jolla account which purchased the license. When signing in to this Jolla account from an Xperia device the license becomes also tied to the IMEI code of the device.
After signing in to this Jolla account from an Xperia device the licensed content becomes available. Restarting the device may be required in some cases - this is the first remedy for you if there are issues in seeing the content.
(*) Licensed content currently: Android support, MS Exchange support and predictive text input.