The Google Play Store requires appropriate licenses from Google for distribution. Apps distributed through the Google Play Store are often dependent on Google’s service framework and will not function properly if they are not officially authorised by Google to be installed into the operating system.
However, you can configure Google Mobile Services manually by methods provided by https://opengapps.org/. We have hence packaged an Open GApps configurator app (available in FydeOS Web Store) that could allow you to finish the configuration in a few simple steps.
It should be noted that this feature is currently in experimental stage and availability cannot be guaranteed.