... and my opinion about this is that https://www.tvmaze.com/images/904028/the-wheel-of-time-image-904028 is mostly used as primary poster (tvdb, imdb, rottentomatoes) and the only backgrounds found are similar to it.
amazon uses same (on search https://www.amazon.com/s?k=wheel+of+time&i=instant-video&ref=nb_sb_noss_2 )