Cover Block: where are responsive font settings?

Using WordPress 5.5.1, a Gutenberg cover block in a standard Post. There are preset Typograghy settings such as normal, medium, large, huge. But where are the responsive settings for smaller screens? Using ‘Large’ on desktop results in text that is way too big on small screens.

Yes I can write css to compensate for this but why is this still necessary? Haven’t they been developing this for years, and yet it still lacks even the most basic features. I dont understand why anyone thinks Gutenberg is anything other than a joke.