We only build our prototypes for success, but people learn from failure.
The most difficult part of creating clickable/tappable prototypes for usability testing is how much functionality to include. 99% of the time you’ll create a flow that matches the outcomes you are testing for. There isn’t a lot of extra bandwidth to build in every button on every thing — you just want to test to see if people will naturally move toward the goal you’ve asked them to reach. You’re trying to see that your design has properly informed your user on how to succeed — but people need failure, too.
Part of how humans explore is by opening all the doors and lifting all the covers to see what’s inside. If you let users click on all the things and see what’s under the hood, they’ll have a better sense of where they are and where they should go next.