Hi Ying,
This s a pretty disappointing response for a number of reasons. I understand that to achieve what I want might not be ‘out of the box’ functionality, but this is Woocommerce, and the stock standard MCE editor. Are you saying that GP doesn’t support woocommerce?
The stylesheet that IS being enqueued in the woocommerce editor is ‘admin/editor-typography.css’ which is being included by GeneratePress theme….. so I would say you do have some control over that. The only thing is that my font selections in the Customizer are not being included/ appended to this stylesheet.