from Android (macOS)
You can back up your notes from Android via macOS:
Download "Android File Transfer" from https://www.android.com/filetransfer/
Connect your Android device via USB
From settings change USB preferences to "File transfer" (see screenshot below)
4. Open installed "Android File Transfer" from macOS
5. Select folder "Android" > "data"
6. Locate folder "app.bibletools.unique_bible_app ..." and open it (see screenshot below)
7. Open folder "files" and you should see a file named "Notes.sqlite", which contains your files
8. Back up the file "Notes.sqlite" as you like, e.g. by copying or dragging to somewhere ...