For Mobile you could just make the text box and text resizable and point people towards JoiPlay (The Rpgm app) I tested it earlier but the text is much much too small for on the phone. The game itself might benefit from it anyway!
JoiPlay is good, but unfortunately RPG Maker MZ doesn't allow for easily resizable text. The only way I can make the text bigger is if I completely rewrite and reformat all of the text in the game 😞
I do apologize, but I would much rather just keep this issue in mind for my next game and make the text bigger then.