Hi Figma devs, I think this problem should already be solved without a plugin.
The font style, size, or others that are related to the font should be able to change all elements with one action.
One more thing that I would suggest is changing and resetting all changes of the text box in a master component, The text in the sub-components should not be changed to the starting text (same as the master component). Because the designers just want to change the styles of the master component, not the text inside it.