There are a number of different fabric photo sheets on the market, you will want to read the packaging and choose the one that best fits your needs. I haven’t found any that actually say they can be ( laundered) most I’ve seen after printing can be rinsed in cold water. It is important to use good quality permanent ink, and depend s on your printer also. The refill inks and inexpensive inks are water soluble and rinse right out.
I prepared my own sheets for one photo quilt ( treated fabric with bubble wetjet then pressed to freezer paper and cut to printer paper size. Used permanent ink. I let my photos ( cure) for 24 hours then heat set, let sit another 24 hours then rinsed in cold water. The quilt is used and the pictures have faded a bit but are still ok, it’s been 15 years.