Oh my gosh, there are a LOT of backsplash ideas from other Hometalk members. Here's the link to what comes up in a search. Have fun choosing! :) Wishing you the best.
You can use ceiling tiles made from tin. https://www.homedepot.com/s/tin%2520tile?NCNI-5
This faux ceiling tile idea worked really well for my daughter... https://www.homeroad.net/2013/09/tin-ceiling-backsplash.html