In that theme, the CSS code removes the bullets site-wide in this CSS:
ol, ul {
list-style: none;
}
You can add them back, but you may want to do so only for certain places (not site-wide) — otherwise the bullets may appear where you don’t want them. For example, if you want them available in your main section of the page, you could add (to your custom CSS):
#main ol, #main ul {
list-style: disc;
}
Firebug is a great tool for finding the selectors you’ll need for specific places.
This CSS reference has info about lists styles:
https://www.w3schools.com/css/css_list.asp
