By default, DITA2Go automatically provides id attributes only for elements that require them; basically, any element that is a link target. To direct DITA2Go to include an id attribute in every element where the id attribute is valid:
[DITAOptions]
; SetElementIDs = No (default) or Yes (add @ids wherever possible)
SetElementIDs = Yes
When SetElementIDs=Yes, DITA2Go constructs an ID to use for the id attribute of every element for which an id attribute is valid, provided the element does not already have an id attribute assigned some other way, such as with a DITAElemID PI marker (see §24.4.6.1 Specifying a value for the id attribute).