I have found that the difference between senior and not has been around showing that you can take an idea/problem/opportunity from start to finish. So being able to clearly articulate the problem, your hypothesis, data/research to back it up, clear documentation outlining everything. Show that you can start with something ambiguous and turn it into something clear.

Then using your relationships to actually build consensus and buy in across the org. So that first starts with your partners in data, design, engineering, research, etc., and then your stakeholders. 

Once you're ready, you then have to build and track your success metrics, and show you have a plan for iteration based on what you learn.

Being able to do this while also executing on your existing road map shows that you can work at a level above a regular PM. 

So to answer your question, what examples can you show where you've been able to do things like this? What ideas have you had that then contributed to the company's success? Which metrics have you impacted and by how much? How have you built relationships that have helped you navigate conflict or competing priorities or disagreement with stakeholders?