Hi @lexerlouwho
Lock screen media controls are determined by the OS rather than individual apps. However, you can thumb-up tracks from the lock screen by tapping the star icon on the left side. Doing this will thumb-up the track on Pandora. Tapping the star again will remove the thumbs-up. Unfortunately, there's currently no way to thumb-down a track from the lock screen.
Hope this helps!
... View more