You will need to download a LaTex font and install it in your computer's font files. try this link: https://ctan.org/tex-archive/fonts/Asana-Math . Then drag the folder " Tex-Illustrator" into the folder "/Library/Application Support/ Adobe/Fonts/Regrd/". Then restart your computer. The LaTex fonts will be available in the font list in Illustrator, like any other font.
( An IT tech can help you with these steps if you cannot locate the folder, etc.)