Collapse feature: Just saying that I don’t like the orange dot prefixed to the collapsed header. Its an eye sore 
Maybe a suffix with an ellipsis and the expand icon would be better
Highlights Also, I quite like the way rounded rectangles are used for highlighting in Apple Notes. Easy on the eye and genuinely beautiful. Can be implemented if the good developers think its worth.
Can we also have category icons please like iOS has for Shortcuts? This means when category icons are displayed they would be the same size as “Overview” icons therefore would give a great looking left menu.
Assigning Note to Calendar When scrolling the list of events in the bottom months are not mentioned in front of each date - only on the first working day and its not intuitive to find/browse the calendar in this way.
Assigning Reminder to Note I can’t seem to pick a date from a date picker (or is it just an icon?)
Note containing only a table ends up with an extra empty line that cannot be deleted no matter how many times you press backspace!
Dead Space Not sure if this is a conscious design decision but on iOS, screen real estate is premium! Could be better utilised.
