Yes, you can definitely use Microsoft Office on a Chromebook. Microsoft Office web apps work very well over the web. That includes apps like Word, Excel and PowerPoint.
Microsoft is moving most of its productivity services to the web. Which means you can access them from any device as long as they have a modern web browser running on it.
Just like Google’s Workspace, Microsoft’s Office 365 service has a suite of productivity tools which is accessible on all Chrome browsers, including those running on Chromebooks.