Is it possible to display column headers for a Yes/No column?
Unfortunately it’s not possible. Y/N column is meant to show the value as narrow as possible. In the same way than phone number & sms icons. You need to use Enum or Text field instead.
I understand it from an aesthetic point of view, but a column with no header just showing a Y/N value does not really inform the user of what it means, especially if there are several Y/N columns next to each other.
I do agree. It has been created while having just one…two of them. If you need more, then you have the way to create same kind of fields with the Text field for example.