Thanks!
How did you install Windows on Mac? Did you use the official method using Bootcamp?
If the problem only happens in Word, but not in PowerPoint, OneNote, or Outlook, try an online repair.
- Open Windows Settings (Windows + I) > Apps > Installed Apps.
- Search for "Microsoft 365" or "Microsoft Office <Year> (2019, 2021)" > Click on the 3 Dots (●●●) > Change > Online Repair > Repair.
- When the repair is complete, restart your computer.