Currently only content controls of type RichText are support (see https://dev.office.com/reference/add-ins/word/contentcontrol). Please add support for other types, specially BuildingBlockGallery, Ch...
Yun_Wang
Microsoft
MicrosoftCheckBox, dropDown and ComboBox have been completed.
https://learn.microsoft.com/en-us/javascript/api/requirement-sets/word/word-api-1-7-requirement-set?view=word-js-preview