Transfer discontinued app from 13 Pro to 15 Pro?

I bought an iPhone 13 right before the iPhone 14 comes out

Apple Reveals New iPhone 15 Devices

SD Card Reader for iPhone, Triangle USB C Memory Card Reader for iPhone 15/iPad/Mac, SD Card to USB Adapter Supports SD and Tf Card Trail Game Camera SD Card Viewer for

Mobile Phones and Smartphones

iPhone 13 Pro vs. iPhone 15 Pro Buyer's Guide: 50+ Differences Compared - MacRumors

Specs Appeal: Comparing iPhone 15 Pro, iPhone 14 Pro, and iPhone 13 Pro - Neowin

iPhone 15 Pro Max review: Apple is slowly winning over this Android diehard

iPhone 15 vs iPhone 13: Is it time for an upgrade?

Apple might discontinue iPhone 13 mini after iPhone 15 series announcement on September 12 - India Today