Let's say... an important piece of business functionality is divided between five backend services, each of which has its own engineering team. For the past couple years there have frequently been either performance problems or system-wide outages and nobody seems able to resolve it. Engineer X is on one of these five teams. They organize some processes, find some key people on each team to work with them, and convince the relevant managers to allocate resources to their project to improve reliability. The initial project is a success. For the next couple years, usage of these backend systems goes way up, since they are important to the business and now much more reliable. As usage grows, naturally reliability problems keep popping up, but Engineer X keeps their cross-team process operating and engineers participating in the process rapidly fix the reliability problems.
You could call these skills "political" but it might also feel just more like "being organized and communicating with the wide variety of stakeholders".