SAVE a SCREENSHOT - in JPG FORMAT - DO NOT WANT PNG
I am using - IOS 26.0.1 - on an iPhone 16 Pro Max
I have Set - Camera - Formats to - MOST COMPATIBLE
But My Screen Grabs - Are Saving as - PNG
Question marked as
Screenshots are always PNG, you do not have a choice to save them as JPG. The Most Compatible setting only refers to pictures taken with the camera and that is not the case for a screenshot. You would need to covert the format to jpg using another method such as a Shortcut.
About transform actions in Shortcuts on iPhone or iPad - Apple Support