I was able to resolve this on my Vanilla Bedrock server (in case someone else has the same issue). I realized after posting my question that the *tar.gz backup file was a compressed file so I uncompressed it. The files were simply the files found in the files manager.
I navigated into the uncompressed folders. I then zipped the ‘bedrock level’ inside the ‘worlds’ folder. Used the file manager and uploaded the ‘bedrock level’ zip to the same ‘worlds’ folder and unzipped it to overwrite the newly installed folder.
I joined the server via the app and everything worked. I had my original server world back.
