Should able to transform the design perspective way. Or artboard should transform into a perspective way to export images for showcase
Sorry for the delay in response. If I heard you right, you're looking for this: https://helpx.adobe.com/in/xd/help/design-in-perspective-using-3D-transforms.html
If I misunderstood you, could you please elaborate more about the issue?
We'll try our best to help.
If I understand correctly, you want to export your artboard in perspective, to showcase it somewhere.
You can't use 3D transform on artboards. Only on layers or groups.
You can make one big rectangle with the size of your artboard under all the layers, to act as a background. Then group that with all the elements/layers on your artboard and 3D transform this "container" group however you like.
There are some online services offering to render your screens automatically onto selected devices, in various positions. Some even have a plug-in for Adobe, like https://angle.sh. It does work a bit awkward though, so follow the instructions closely. And they do try to let you buy more and better mock-ups. But maybe it works for you.
If you're familiar with Photoshop and Layers, then it might be easier to just do it yourself. Try finding some sample mockups (there are many for free) by Googling e.g. "adobe xd mockup photoshop devices screens".