FindFont is a plugin for Adobe XD with which one can find all instances of a font style and replace it with another.
How to use: First select a text field with the font to be replaced. Then select a text field with the font which will replace the former. Run the plugin to replace all instances of the first font with the second.
FindFont currently works only if a text field/text area contains a single type of font. Also the plugin will not replace text under Repeat Grids or Mask Groups.