Your data is always 100% yours. If you want to export all of your data out of Sofa, it's super easy to do.
Tap the "Settings" button in the top left in the home screen.
Scroll down to "Export" and tap the "See Export Options" button.
Once you tap on the export option of your choosing the iOS Activity Sheet will appear. This allows you to put the exported data anywhere you'd like.
For example, you could email it to yourself, save it in Files, or open it in another app.