In Chat GTP choose the option to create an image. Attach a single image and use this prompt “I need this image in a 1:1 ratio without stretching or squeezing any features and without cropping out any features”
Save the image as [property name] 01 for the feature image and then 02, 03, 04 etc for gallery images. Once you have done this for all photos visit - https://compressimage.com/en - click “Choose Images”, select all the images you have just created, and this tool will convert to webp and ask you to save a zip folder.
Unzip the folder and then add the images to this form.