Google has informed US users of the previous Google Pay app on Android, iOS, and the web that they will need to switch to the new app to continue. The original version will lose that feature on April 5, as well as the ability to access recent activity and transactions. Google released the revised new app.
The change will only affect users in the US for now, as Google has yet to roll out the latest app in other regions. People elsewhere can continue to use the original app as usual for the time being.
It appears that users of the old app will still have access to their digital wallet, including payment cards. What 9to5 Google note, that version can still be useful in some situations. You can only use the new Google Pay app on one device at a time.
If you still have funds in your Google Pay account after April 5, you will only be able to access them through the new app (which is still in Early Access). Otherwise, the Google support team can manually transfer the money to your bank account.
Google will also update the terms of service for US users on April 5. It will increase the minimum age for a Google Pay account from 16 to 18.