As of v3.0.0, the iOS client forces the user to enable Touch ID to unlock the app. It doesn’t ask and there’s no option to disable Touch ID as far as I can see.
Could this be made optional please, so we can just have a six-digit passcode with no Touch ID?
The bonus of the six-digit passcode lock was that it was something additional to what is needed to unlock the device itself. Now, Touch ID opens the device and also opens Nextcloud, so this update has unfortunately removed a layer of security.