Value document showing my Excel and Dashboard skills

Hi everyone, I’m currently prepping for an interview with a construction company in their procurement department. In a brief chat with the hiring manager I found out that the role focuses on Advanced excel skills, creating dashboards (Power BI) and presenting skills. Apart from this it may also include ETL on a daily basis.

I want to be proactive and create an analysis which comprises all of these said functions and I can take to the interview. I have used excel in my previous roles: Lookups, power query, creating light dashboards in excel and power BI. When they said advanced excel and dashboard what apart from this can I do?

Edit: If anyone has got a sample value document or similar prep material I’d be thankful to view it.