In Lightroom Classic we can press "Y" to view the original next to the edited one. I know I can press "\" to view the original but it only switches back and forth.
It would be nice to have the ability like you can in classic to view the original side by side. Scenarios exist where you are unsure whether a specific edit improves the overall image or not, and more often I like to show my editing work to others and it's much easier to take a screenshot of the original next to the edited to send it off for either validation or feedback.