On my Android device the Symbol for Shop/cart has disappeared in the menu section with the 3 lines.
Good morning Andreas!
I dont use android, so I can't help you troubleshoot other than to say, "Did you try turning it off and on again?" (And make sure you have good internet).
However: If you are trying to make a purchase, you can do so on the website. Just make sure to use the correct credentials (username/password).
It was removed to comply with Google's policies.
Yes. Google has updated its policies regarding stores in Android apps - or to be more accurate, they updated their policies some months ago, with a grace period that has now expired.
Navigating the policy changes hasn't been easy, so we decided to temporarily remove the store button while we (and lots of other developers) figure out what Google will now allow. Unless Google has a change of heart, or gets forced into a change by regulators, the store won't return to its previous form, but we hope to restore some store functionality in the near future.