Onyx Boox Tab X C

[ArthurN]

I bought Onyx Boox Tab X C in China and unfortunately it doesn't come with Google Play Store. In the apps section of the device I can see Google Play services and Google Services Framework running. Installing Google Play Store apk from other sources didn't help.
Official recommendations form Onyx on activating Google Play Store by activating GSF ID and Google account are not available- Tab X C comes with firmware 4.0 and it just doesn't have this option visible.
I also could find international firmware 4.0 for my device.
Apk directly downloaded onto my device work as expected. I just wanted to enjoy the benefits of having native Play Store.
Is there anything I can do to install Google Play Store?