Formatting text in Mozilla Thunderbird tasks?

Question

Mozilla Thunderbird

Recently, he finally abandoned doing business with a pen and notebook in favor of an organizer. I am using Mozilla Thunderbird. At first, I really liked everything, but over time, a drawback began to appear in the absence of the ability to format text in the description of tasks and events (and this is with the richest functionality of a text editor for letters).

Tried looking for thunderbird add-ons that could embed markdown or html support in a text field, but couldn't find anything working. Maybe there are some ways to customize the text formatting for describing tasks and events (changing the style, size, color, font highlighting, etc.)? Are there any relevant add-ons that expand the functionality that I might have missed or missed, or regular settings (maybe about config)?