Some positions come with responsibilities for people and associated automatic leadership.
Think of Leadership Authority as a “Leadership Head Start,” but those positions are few and sometimes must include other skill sets which not every educator possesses.
You to other Teachers.
Someone with the same job as you can bring differing types/levels of contributions. Some teachers are consensus-builders among peers. Some teachers become technology support agents within a work group. Some teachers lead an expedition for increases in academic standards from a classroom/grade level.
Not all teachers are leaders among their peers. Peer leadership is hard work, because teachers all start out equal, any leadership role is earned over time and steady contribution/value to those peers.
You as an Educational Expert.
Sometimes your expertise as an educator is most valued outside education. You have the power to alarm or quell other families as they interact with a sometimes confusing educational system. You can speak for or against educational policies publicly from a place of knowledge and experience, influencing others to do the same.
You can also take lessons from “The Real World” and soften them, but present them to your students as rue learning opportunities.
Consider the ways you are a leader, all because of what you do after you close the classroom door