No specific info about version 15.2. Please visit the main page of Install macOS Catalina on Mac Informer.
Create a bootable USB key from OS X 10.9 to macOS Catalina 10.15.
Build a bootable drive from OS X/macOS installer program.
Install and run macOS Catalina on your unsupported Mac.
Install macOS Mojave on unsupported Mac computers.
macOS Sierra Patcher helps you to install macOS Sierra on unsupported computers.