I recently got into GrapheneOS and tried different weather apps but none of them could beat the DWD Warnwetter app I've been using before.
So I downloaded it via Sandboxed Google Play, which has a Google account linked with the in app full version purchased.
I've confirmed it instantly working on another stock Android device, but somehow I can't access the full version on my device running GrapheneOS.
In the app it offers me to buy the full version, which also doesn't work. I was able to install bought apps and run apps that depend on google services provided, but not access the in-app purchased upgrade.
Is there something I can do about it?