I'd like to "third" this request.
Although, I've had success on clones my Retroid 3 (Android 11) with the following:
1. Install LaunchBox on the "new" Android device, then quit (this sets up the folders and such)
2. Use a file explorer (I recommend FX) to find your unique string ID. Determine this by using FX and looking at SYSTEM/storage. You will see 3 folders, <UNIQUE STRING>, emulated, and self. Take note of the unique string - you will use this in the following steps.
3. Do a search and replace within all of the .xml files located at EXTERNAL_STORAGE/LaunchBox/Data/Platforms/*.xml on the old device to update the <UNIQUE STRING> to match the new Android device.
a. Search for "<ApplicationPath>/storage/<UNIQUE ID>/" in all of the .xml files and replace with the <UNIQUE ID> customized setting for your Android device. I recommend copying to a Windows PC first and using Notepad++ because you can open all the .xml files and do a search-and-replace across all of the files at the same time.
b. Copy the modified .xml files to the new Android device.
Done.