How add Pictures in the calendar

Sorry no.

When you add an image or a document to a calendar event, that picture/document doesn't appear automatically (you need to tap to open it). It's only an attchment, and what you're asking for is not available at the moment.

If you'd like, you can submit your request to Apple using this link:--> Apple – Product Feedback - iPhone

We are just users like you, not aware of Apple future plans.

Regards

Giulio

Using iOS 13 or later you can add one or more attachments to your calendar's events. So the first thing to do is to update your iPhone to the latest iOS version.

To see the procedure, click here:--> Create and edit events in Calendar on iPhone - Apple Support

Regards

Giulio

My pleasure, Marina :-)