I have a core-data app about plants and would like to deliver the app with 50 plants for the user. However when I upload the file into iTunes Connect the data is not included. What can I do to have the data (sqlite) included?
If it's not in iTunes Connect it means that that file isn't in your app's resource bundle.
You've got three main options:
There's another option--add the SQLite file to your app bundle and copy it to the sandbox on first launch--but that's strongly discouraged due to the iCloud backup limits. If it looks like you're creating a big file without user interaction, you'll get trouble from App Review.