Pre-viewing .doc and .xls files

Finding some information about this, but a lot of it is pretty old so I want to make sure it's still accurate. I have Windows 10 and use LibreOffice. I installed the ActiveX component in LibreOffice, which they said would allow me to view these documents in IE (and Opus I inferred). But I'm still not getting previews of the office files. So does this really only work if you have MS Office or buy QuickViewPlus for $99?

What happens if you drop one of the documents on to an IE window?

If that works, it's a simple thing to configure it to work in Opus as well. But I'm not sure it still works, as OpenOffice/LibreOffice neglected their viewers for many years, to the point they stopped working last I checked. That was some time ago, however, so they may work now. Check what happens in IE.

I cannot view them in IE either.
I'm just amazed nobody has written a third party viewer since so many people don't use MS Office anymore.