A family of Microsoft word processing software products for creating web, email, and print documents.
On an Android device like the Samsung Galaxy Tab S10 FE+ tablet, you do not install Office from your Microsoft account online, you need to go to the Google Play Store and install the Microsoft 365 app from there, then log into the Office app with your Microsoft account to activate the apps.
The Office apps on an Android device have a lot of functionality, but they do not have the full functionality that you would have on a Windows Pc or Apple Mac computer.