How can I mimic dropdown and other interactions on XD.. Currently I'm only able to create navigation from one art-board to another..
Currently all XD supports are the artboard-to-artboard transistions. We are looking into adding additional interactions like scrolling and dropdowns. We are prioritizing features based on user feedback, so go to https://adobexd.uservoice.com/ to vote for features that are most important to you. It sounds like the features you're interested are https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests/suggestions/12869166 -scrollable-area and https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests/suggestions/12869229 -animation-support-microinteractions
Has this type of functionality been added yet?
Not yet! You can check the links above for a status on the features.