I followed these instructions from Apple Insider:
https://appleinsider.com/articles/21/01/06/how-to-change-app-icons-on-macos
I got the logo from here:
https://apps.apple.com/us/app/bang-olufsen/id1203736217
Once you have the logo on your screen, hit 4 keys at the same time: command-control-shift-4, and drag around the logo. Then go to Preview, and select File > New from Clipboard. Save the file. Then follow the Apple Insider instructions.
Here is how my Beoplay Remote logo looks on the Launchpad, in between other installed apps:
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For a Beoworld discussion on the Remote, see:
/forum/other/beoplay-remote-for-macos-poc
To download the Remote, go to:
https://github.com/tlk/beoplay-macos-remote-gui