Sometimes there's some delay in the autoloading of photos from phone to Google cloud photos. In those cases, I can email photos from phone to my email address. There is no shrinkage of file size to do so. Gil
PS: As pointed out by Brent, text does alter file size; not so with email. My phone is a Google Pixel 6XL. Can't predict what Iphones or other droids will do, but automatic transfer of phone photos to cloud is seamless.