Honestly I would get some window film that looks like stained glass and call it a day. You still get some light without having to see the eyesore on the other side.

Something like this: https://www.amazon.com/artscape-Available-24x36Magnolia-Wind-inches/dp/B000Q3QWRG/ref=sr\_1\_8?keywords=stained%2Bglass%2Bwindow%2Bfilm&qid=1681314639&sr=8-8&th=1