The way the web works is that elements nested within a parent element will inherit the font-family defined in the parent unless explicitly set on the nested element.

It would be a really useful feature in Figma to allows something similar where you can define a font family for a frame so that all the text elements inside inherit that font-family, so if the font-family needs to be updated you don’t need to change the font-family for every text element within the frame. However, the nested text elements with a font-family explicitly set would remain unaffected.

You could also do something similar with text styles where a text style can inherit from a parent text style so you can make more broad font-updates to your text styled without having to change each one individually.