I believe you can do things to the font size, bold, and maybe other things
Check out this tool: How do I put colorful writing in chat? - #43 by rammstein
Edit: that only is for emojiis and colors, I’ll look to see if I can find anything else
There are some websites in this thread that help with different fonts. Note that some of them won’t work in game: Cool Fonts - #14 by KalamityKaspar