While a skill - especially, soft ones - is best observed when witnessed first-hand, I believe certifications/badges do come in handy to invite attention. Below are some of mine, their associated skills, and my notes as well.

Tools

GenAI for Business Leaders by IBM

Design Thinking: Implementing the Process by PMI

Project Management Basics by PMI

Finance for Non-Financial Managers by NASBA

Technology for Product Managers by PMI

Product Strategy by Product School

Product Roadmapping by Product School

Product Management Basics by Pendo x Mind the Product