Users of the tab S4 should be getting the new software update in a few days or any moment from now, however the update which comes as version T835XXU4CTF5 is only for the Galaxy Tab S4 LTE version and is rolling out only to users in Europe.
The Android 10 update brings along an improved Dark Mode, clearer app icons and system colours, smoother animations, and new full-screen navigation gestures to the Galaxy Tab S4. The new firmware also includes other features like Music Share, Quick Share, a newer Gallery app, digital wellbeing and Samsung Daily which replaces Bixby Home. The tab would now also have improved layout for titles and buttons as well as the camera, better text over wallpapers, and a redesigned Device Care section.
System apps such as Calculator, Calendar, Contacts, My Files, Reminders, Samsung Internet, and Samsung Keyboard have all received new features and design. The SmartThings panel has been replaced with Media and Devices in the Quick Settings area. Along with the One UI 2 Update comes also the standard security patches. You can click to view the detailed changelog of the update.
Users in Europe will receive a notification prompt in a few days otherwise, you can check for the update manually in your tab settings > Software Update menu and have a go at the installation.