✅ How to get ids from tuple list?

I have following list:

List<(string Path, DepartmentDto Department)>

List<(string Path, DepartmentDto Department)>

All I want is call following method with departments ids as parameter:

await _subjectClient.GetByDepartmentIds();

await _subjectClient.GetByDepartmentIds();

I can do smth like this:

foreach(var department in departments)
{
    var id  = department.Department.Id;
    await _subjectClient.GetByDepartmentIds(id );
}

foreach(var department in departments)
{
    var id  = department.Department.Id;
    await _subjectClient.GetByDepartmentIds(id );
}

but it's not optimized
how to do better?