If you have an old phone with Prime already installed, use a file manager like Solid Explorer to extract the APK (using an APK extractor tool) and transfer it to your new device. This is the only legal method to share the Prime features without paying again, provided you own the license.
The Prime license costs less than a Starbucks coffee and works on every Android device you will ever own. Just buy it once. Nova Launcher Prime 7.0.57 Apk Download
This version brought significant modernizations to the launcher's core engine: If you have an old phone with Prime