My alarm clock, ‘Sleep as Android’, got transferred with settings. My authenticator, ‘Aegis’, didn’t get re-installed, but kept its data. My habit tracker, ‘Loop’, neither got re-installed nor kept its data. Most apps got re-installed, but lost their data and settings.
Kudos to apps that allow exporting everything: Data AND settings. Less kudos to apps that can export data, but not settings (looking at you, @AntennaPod). No kudos to apps who can’t do either and need to be reconfigured manually.