Hi Alan,
The Record button on the Tracks screen is only visible on iPhone (6 and later), but it’s a good idea to include it in the iPad version too.
However, this button doesn’t trigger audio recording, only MIDI recording. Audio recording is only possible in the wave editor, as you described.
The ruler in the Tracks screen cannot be set to display seconds, but tapping the blue measure display in the wave editor toggles it and the ruler between seconds (default) and bars/beats. Hope this helps!