LaunchPad
This application is a functionally equivalent program to the MacOS LaunchPad.
Download the installer for the appropriate Apple hardware, either Intel or Apple Silicon.
Run the installer and select the folder that you want to install into.
When the application is installed you should run it and you will see the default empty launchpad.
Unlike the MacOs the launchpad will not be populated with all your applications at startup.
What I recommend it that you use the + button to create your Categories first. You may want to create a category called "Imported" or "Temp" as well.
When these categories have been created (and you can add/edit/remove them later) You have 3 ways to add the applications to your launchpad.
Option 1)
With Launchpad open, use the Macos Finder to drag and drop the application want to the appropriate catergory/tab on the left of the LaunchPad. You only need to drop it on the "title" or name of the category and it will be added to it automatically.