I've seen some ideas about this already but, wanted to be a little more extensive about fonts. Rather than just changing it in general.

First would be of having the capability of changing font size just on textra.

Additionally adding a bold feature to text as some of the text looks thin compared to the text bubbles.

lastly adding customizable fonts such as cursive or what ever your heart desires.

Thank you for being an amazing secondary solution to poorly made factory sms applications! you're doing great!