[Word] add automatic numbering to figures using caption

If you want to do numbering for figure, click on the figure, references -> insert caption
select the right type or define a new label, write additional information in the caption box.

more guidance:
https://support.office.com/en-us/article/add-format-or-delete-captions-in-word-82fa82a4-f0f3-438f-a422-34bb5cef9c81