UTable Accessibility for screen readers (th scope)

### Description

Im going through our site for Accessibility and noticed there is no scope attribute on the th elements on UTable. There also seem to be no way for me to add it.

Have this been overlooked, or am i blind? pun intended

https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Table_accessibility#the_scope_attribute