You need Thunkable to change the content of the LocalDB regardless if you are able to change it from the phone directly.
Even if you can do so, you cannot distribute the LocalDB separately.
Even if you were able to do it on Android you will not be able to do it on iOS.
The better way is to have something like a Google sheet and synchronise the data in the sheet with the LocalDB if and when necessary.
Happy Thunking