My client side is mobile I am able to send image to python

Python does image manipulation and sends file back

But the problem is how do I process it on client side do I need to send file response as bytes to client side or what

Honestly I am so confused and spent whole day on trying to make it work so any help would be amazing

Edit - my fastApi code

@app.post('/uploadImage/', tags=['Images'],) async def get_image( image: List[UploadFile] = File(),):

# im = Image.open("hopper.ppm")
# newImage = await merge(image[0],image[1])

file_location = f"image1.jpeg"
file_location2 = f"image2.jpeg"

with open(file_location, "wb ") as file_object:
    file_object.write(image[0].file.read())

with open(file_location2, "wb ") as file_object:
    file_object.write(image[1].file.read())

im1 = Image.open("image1.jpeg")

im2 = Image.open("image2.jpeg")

new_image = ImageChops.multiply(im1, im2)
new_image.save(fp='newImage.jpeg')


return {
    'File Response':FileResponse('"newImage.jpeg"',filename='mergedImage.jpeg')
}