Is it force prohibit use jpeg files when publishing assets in the asset store?
Yes, this is what it says in the publisher guidelines. You’re supposed to use PNG. But assets provided for runtime use should be in uncompressed formats.
There may be exceptions when there is good reason to use a JPG, perhaps to save disk space for an editor tool window’s background image where it makes the difference between <= 100 KiB vs >= 1 MiB.
You can always mention this in the reviewer’s notes and if the asset still gets rejected for that reason, be prepared to replace the assets in question with uncompressed versions.
Thank you for your reply. I just resubmitted the asset and asked for permission to use jpeg files because these images are used to train the neural network.