I too enjoy the charm TUI libraries, and have been using them to build a settlers of Catan game[0]. And some features are really cool, like different colors depending on dark/light theme.
They have a bunch of functions that concatenate strings, which may not be very efficient compared to using string.builders, but I haven't yet had performance problems.
However I haven't had such a great experience with AI, IMO they're bad at ASCII art.
They already listed foveated rendering in the features (which I believe is what you're describing). It use the graphics performance budget efficiently, but it can't physically add more pixels.
It's really cool technology anyway, and according to PSVR2 reviews, it seems to work well.