ms office – hat{} symbol “^” in a LaTeX equation in Pages disappears after being exported to a MS Word file

I use Pages 10.2 (7028.0.88) on macOS 10.15.7. As I finished editing my Pages file and exported it to a .docx file for my colleagues, all the equations in it were successfully passed to the new file and became editable in MS Word, except that all the hat{}‘s “^” were missing. I also tried widehat{} but encountered the same problem.

Is there any other LaTeX symbol that looks like hat{} “^” and can stay in the equations after being exported to .docx?