You can miss being needed without missing the task that made you necessary.

Being needed and doing the task are separable. You may not want the work back at all, and still miss the position it gave you, the sense that things would not run without you. What ended was a role, and the relief and the loss are both accurate.

When something you carried finishes, name which part you miss. If it is the being needed, look for where else that is available rather than trying to reclaim the task. People often take back work they do not want because it was the only version of the feeling they could find.