@purplehayabusa There are 3 wall paper chapters on the chinese official manga site here: https://comic.bh3.com/book/1012
Look for the chapters named "壁紙精選". The chapters contain certain panels/pages in the chapters with the bubbles removed, you might find the ones you want there. Do note that the wallpapers (since they are taken from panels of the manga) might contain spoilers.

almost every chapter, there's at least two or so pages that would look absolutely incredible with text bubbles and boxes removed. this chapter is no exception.