Thanks for your feedback. Which ones do you think negatively impact accessibility?

Preventing text selection might be one, but this is actually more for interactive elements like buttons, images, or draggable items that you sometimes not want selected and not text. Scroll-behavior: smooth might be another one, but consider that this is added in CSS, it's only a suggestion for the browser. If the user prefers no-animation, they can switch it off in their browser. Animating the scroll with JS is the anti pattern as you can't disable that! Apparently, if you switch off animations it will disable scroll snapping too!

Disabling pointer interactions might also sound questionable but there are justifiable scenarios, maybe it's for decoration, maybe it's disabled, maybe it's hidden, etc. Like with everything, you need to be aware of the rules, but I don't think these CSS features are immediately bad for accessibility, only if used incorrecrtly.