Since this device is older, "updated" usually means moving from the stock Android 5.1 (Lollipop) to a more functional, debloated version of Android 7 or 11.
Head over to forums. Search for "Galaxy Tab A6 SM-T280 Custom ROM." Download the ROM .zip file and transfer it to your tablet's internal storage or an SD card. samsung galaxy tab a6 smt280 custom rom updated