Genmoji, the ability to generate custom emojis with the help of AI in iOS 18, will probably be one of the most appreciated features in Apple's Apple Intelligence suite. However, you'll need either an iPhone 15 Pro/Max or an iPhone 16 to get Apple Intelligence working on your device. That will be the only way of accessing the Genmoji feature. Unsurprisingly, Google is developing a similar genAI feature for Android 15.
The Markup code teases that you can 'save sticker' and indicates it looks for the Creative Assistant app and associated permission to work. Generating emoji with Apple Intelligence on iPhone. Furthermore, Rahman discovered code in the Markup app that indicates a 'remix' button is coming in Android 15. The button will launch an activity in Creative Assitant. You might be able to generate a sticker or emoji and add it to the screenshot or image you're editing.