Not exactly stained glass but I bought these “instant lead lines” adhesive strips and DIY’d a leaded glass panel on some cabinet doors. Found and printed a design and taped it to the other side and then applied them. It’s not perfect but it was fun

https://www.amazon.com/Gallery-Glass-Instant-Strips-17041/dp/B002WE5ALG/ref=asc_df_B002WE5ALG/?tag=hyprod-20&linkCode=df0&hvadid=193994329151&hvpos=&hvnetw=g&hvrand=7041344204435385693&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9018851&hvtargid=pla-309988364333&psc=1