Multiselect default values not display

Hello. I am trying to use the multiselect component for one of my forms. I can't seem show the default value in the input fileds. I think I follow the doc. Can you point mt out what am I doing wrong? I also tried removing the {{}} with just [':dog: Dog',':cat: Cat']

The items in that array have to be values that are contained in either the manual or mapped options. It looks like you currently have no options added for that component.