A family of Microsoft word processing software products for creating web, email, and print documents.
The Table of Figures in Word is a variation on the Table of Contents field.
You can insert a Table of Contents, but not, AFAIK, a Table of Figures.
Copilot (unsurprisingly) gives meaningless instructions.
Generally, there are few fields addressable in the online program.
I know of no way of modifying them in the online program.
The online app is but a poor cousin in features to the desktop application.