hey there!
yes, a percentage based font size is actually a "vw" size which means viewportwidth, so the content max width setting will have no effect on this
you can add your own media queries
Screenshot 2023-03-14 at 20.29.57.png
when you take a look at your textformat, you see: "HTML Class:" _Headline1
(it will be a different word)
then create css:
lay options → custom css & html → Custom CSS
(dont put this in custom css for desktop or mobile)
https://developer.mozilla.org/en-US/docs/Web/CSS/Media_Queries/Using_media_queries