The new update brings a refreshed UI and the usual Android 12 and One UI 4.1 goodies to the Galaxy Tab A7 Lite in addition to the July 2022 Android security patch.
The firmware carries version number T225XXU1BVGB and is rolling for the Galaxy Tab A7 Lite sporting model code SM-T225 in Hong Kong and Germany. The rollout will hopefully expand to other models and regions soon.
If you live in Hong Kong or Germany and haven't received the Android 12 update on your Galaxy Tab A7 Lite yet, you can check for it manually by navigating to its Settings > Software update menu.
Samsung Tab A7 is not the same as A7 Lite. The A7 already has the update, you are correct.