Howdy Yohanca7,
It sounds like you are having issues sharing your iPhone screen. We know how important this is for you, and you’re in the right place to find a resolution.
The first thing to try is a normal restart of the device. This simple step can resolve issues like this. How to Restart your iPhone.
Please make sure your device is running the latest iOS version 15.6.1. How to update your iOS device: Update your iPhone, iPad, or iPod touch - Apple Support
If still having issues, then please let us know what device you are trying to share your screen with. This will help us better understand how to assist you.
Farewell!