How to get quicklook working for Microsoft Office files

On macOS 10.14.6 and MS Office 16.32 (latest version), quicklook previews only show the icon for .doc and .docx files. I have checked qlmanage, and cleared its cache:

~ qlmanage -r cache
qlmanage: call reset on cache
~ qlmanage -r
qlmanage: resetting quicklookd
~ qlmanage -m | grep microsoft
  com.microsoft.powerpoint.pot -> /System/Library/QuickLook/Office.qlgenerator (39 - loaded)
  com.microsoft.word.doc -> /System/Library/QuickLook/Office.qlgenerator (39 - loaded)
  com.microsoft.word.dot -> /System/Library/QuickLook/Office.qlgenerator (39 - loaded)
  ...

But still no joy. Most of the files are created by someone else on a PC (also running latest version of MS Office), and shared over Google Suite. Will that stop this feature from working? Are there any work-arounds?