Microsoft has been telling people for a while Cortana Will disappear on Android devices. This week, it finally happened. Fortunately, no one seemed to be affected or even noticed.
Cortana is Microsoft̵
This is what Microsoft said.
Starting March 31, 2021, the Cortana content you created (such as reminders and lists) will no longer work in the Cortana mobile app, but can still be accessed through Cortana in Windows. In addition, Cortana reminds, lists and tasks will be automatically synced to the Microsoft To Do application, which you can download to your phone for free.
RIP, Cortana on Android.