Hello,
By default, there is no possibility to add custom font in Theme Options, this request additional customization (additional customization in source code is out of our support scope).
You may use css code in Theme Options > Styling > Custom css or style.css file of child theme, for example:
@font-face {
font-family: "Open Sans";
src: url("/fonts/OpenSans-Regular-webfont.woff2") format("woff2"),
url("/fonts/OpenSans-Regular-webfont.woff") format("woff");
}
set own path to font
and then you will be able to aply the font for elements via custom css code.
Regards