Android
Gboard brings Undo button on Android smartphones

Gboard is a widely used application on Android smartphones that allows users to get more convenience in the working of the devices moving forward. Gboard is giving you one more convenience for typing more efficiently with the dedicated undo button.
The Gboard new undo button has been under development since 2023, and finally it has started rolling out for the Android smartphones. As the expansion of new users is happening gradually, it will take time to reach every user.

For your information, the undo button for Gboard gives you the ability to go to the last deletion of a letter at a time. However, if you have deleted an entire sentence or the work, then it will bring you the whole set of words or sentences deleted in the very last time.
According to the report, the undo option is working until you are using it on the application. If you switch to another application, then it will not remember the particular words or sentences once you exit the application.

The undo button is spotted on the latest Gbord update with version 14.9.06.x in the beta update. If you also want to use the new functionality, then you can join the beta program from the Google Play store.