As I understand this CSS property it is used to prevent the user from accidentally selecting text and other elements that are used for stylistic reasons, or are part of the user-interface (e.g. a clickable div
with the text "Copy" or "Share" in it). So it seems reasonable that search engines would ignore these text elements in favour of selectable content. Is this a correct assumption?
Sources:
user-select: none
, let the page get indexed, and then search for it and see whether the page comes up.