Whiteboard?

You can create your own whiteboard tool with Javascript. Thus use that in Storyline. Some Javascript libraries that do that are:
https://caboodle-tech.github.io/whiteboard/index.html
https://github.com/caboodle-tech/whiteboard

But this sample is a simple single user whiteboard, i suppose you want multiple users to simulteanously draw in Storyline. Well thats possible too... search for 'multiuser whiteboard javascript library' and you will find quite a lot.

One i had working before in Storyline360 is:
https://togetherjs.com/
Togetherjs is a library by Mozilla and easily connects multiple users to your slides.
Here is a sample showing drawing...
https://togetherjs.com/examples/drawing/

So it is possible... but you need some good Javascript skills to get it working.