Consider theme.json fluid typography.

[tcmulder]

Link: https://make.wordpress.org/core/2022/05/27/block-font-sizes-and-fluid-typography/

Unfortunately, it appears 1600px to 320px is hard-coded or something, because it always starts/stops at those values for now. Also, though I had 42px set as a minimum, it changed it to 39.963px for some reason...

But, on the plus side, it's really cool that it starts resizing at the max screen width and scales down to min screen width, so everything scales at exactly the same pace, unlike mine which min-out randomly.