Office version: Microsoft® Word for Microsoft 365 MSO (16.0.14301.20004) 32-bit (Dev Channel)
After I upgraded with the latest Office, I saw the toggle button to switch between dark/light background for the Work Page itself.
Unfortunately, after I restarted my machine to apply the change, I can't see that option anymore.
I cam back to my Mac, upgraded my Office 365 and saw that option over there, but not on my Windows Office 365. What shall I do please to get that back?