Launchpad and Launchpad Manager
Here is some current information concerning the Launchpad Manager app for macOS.
The app is available from the website "launchpadmanager.com" (by the way, the site itself is not secure).
The app has been updated and verified to work with macOS Catalina, and I am currently using it with the Big Sur beta and have experienced no unusual problems, with one exception so far - the default group "Other" that macOS places the less-used utility apps appears as an empty group in Launchpad Manager. User-created groups, however, seem to be represented properly.
If you have a comment or issue with this app, you may contact the author at the email address "miklosi.attila@gmail.com", and there is another email address "attila.miklosi@gmail.com" as well.
Mac mini 2018 or later