Apple lets you create a poster for yourself based on your aesthetic preferences and it will appear every time you call one of your contacts who also has an iPhone. Additionally, you can set posters for people who are saved in your contacts list. This way you can set posters for people who don't have an iPhone or who haven't shared their Contact Posters.
How to Personalize Your Contact Poster on Your iPhone | Apple Support
Let's take a look at how to create contact posters for other contacts on your iPhone.
You can follow the guide below to create contact posters on iPhone.
Now follow one of the steps below depending on the option you chose in the step above.