Apple - how to persists data in TestFlight to production for my testers?

I asked this in the Apple forum however there have been no replies.

I use SQLite database in my app. The data that is in my testers local db on the device. How do I get that data for my testers into their production version of the app after they download it from the app store.

What happens when a TestFlight app expires?

After the 30-days-period expired, your test won't be able download or run your app.

How long do TestFlight builds last?

If you checked the Automatically notify testers checkbox, your external testers will receive notification emails at this point. Otherwise, you'll have to go back to App Store Connect to start testing. Your external testers will then receive an invitation email. Note: A build is only valid for 90 days.

How long do TestFlight apps last?

Each build is available to test for up to 90 days, starting from the day the developer uploads their build. You can see how many days you have left for testing under the app name in TestFlight.

AFAIK after publishing in App Store, Testflight users will be able to download app form store. It should work as regular update.