in MMM-GoogleAssistant, this feature don’t exist (but you have read default template) :
Extented: { welcome: { useWelcome: true, welcome: "what is the date" }, },MMM-GoogleAssistant must be have NO position (it use popup)
position: "lower_third"in MMM-Detector (you have a mismake reading of default config too !)
useIcon: true,must be inside config: { }, you have set it outside …