Genmoji is not working on my iPhone 16 Pro Max

With Apple Intelligence,* you can create custom emoji—called Genmoji. Simply describe what you want the Genmoji to look like or create one of friends and family ...

Create your own emoji with Genmoji on iPhone

*Apple Intelligence uses generative models and outputs may vary. Check important information for accuracy.

Does your iPhone 16 Pro Max configuration match all language and location requirements and settings listed here, including EU and China if applicable:

How to get Apple Intelligence - Apple Support

In what way is it not working as expected? Where is it going wrong?