I've tried to set the min-height and max-height to 600px, but it is not working, the height of the editor still showing 300px.
Hello candy ho,
Not sure why is not working for you but if min and max value for you is fix then do one then change the default value of that component it will work then open Ck_editor 5 change the default value what you want as below screenshot
publish that and used that for your application.
if you give "" then it will auto growth
Thanks and Regards,Akshay Deshpande