Colleagues always emphasize that this is not her job scope. What should I do?

The work of many units and departments can basically be listed. You make a list and give it to two people.

Also, if this matter does not lead to serious consequences, don't do it. Let the leader ask before doing it, so that either the leader gives it to her or you do it, and the leader will know that it is your credit.

I wish you happiness!