Is there any way to know how many percent progressed in exporting progress?
It is still exporting over 1 hour, so I want to know is it exporting or stopped.
This is most likely the subroutinisation taking very long. Check the Activity Monitor if there is a process called “makeOTFGlyphs” that is running at 100% CPU.
To prevent that, disable subroutinisation with the custom parameter: Disable Subroutines in the instance settings.