How can I sync Giant‘s’ Fit or account cycling data to Garmin's account?

How can I sync Giant‘s’ Fit or account cycling data to Garmin's account?

I have a Giant Planet G3Pro code table,but it can not export .fit file to windows.

I want overlay cycling date in insta360 X4 video taken by instrument panel form.

What can i do please?

Is there someway i can sync Giant account date to Garmin?