While there was no official 2021 update, users and reviewers reported that the tablet could be modernized using :
If you own a Lenovo Tab 4 10 (TB-X704F) and are hoping for an Android 10 or 11 update in 2021, we have some important news. While this tablet was a solid mid-range device at launch, software support has officially ended. lenovo tbx704f android update 2021