Apple devices such as iPhones and iPads take photos in HEIC format by default, and Windows 10 does not include a way to read these files so you might have trouble viewing them.
If you are running Windows 11, this does not apply to you because the extension comes built-in.
LIVE Photos are also not viewable on Windows PCs - in order to see these pictures, they must be converted from a LIVE photo to a normal JPEG on the iPhone or iOS device it was taken on.