Hello babydog2792,
We see you have an issue with your iPhone display not showing correctly. You mention part of the screen is overlapping another app or area. The first thing we'd recommend is to restart your iPhone. That usually resolves an issue like this.
Restart your iPhone
If you aren't able to restart it normally, you may need to force restart it: Force restart iPhone
If your display continues to show like that, you'll next want to reach out to Apple Support directly for additional support options. You can reach them here: Get Support
You can also find the support phone number for your region at this link: Contact Apple for support and service
Take care.