Musicxml export - top texts don't export
I'm trying to transcribe lots of good scores into braille, taking some Open Score editions. When I export Musicxml files, no matter what version of Musescore I'm using, the very front texts can't be exported. For example, the intro texts of The Planets, and Allegro moderato of this Faure Pavan (https://musescore.com/user/4887176/scores/5301216). I think they are just words or credit words. Why can't they be exported? I have to look into the exported text of the pdf file to bring these texts back. Can this issue be solved? Thank you in advance!