Graphs to show how the convergence of, for example, how residual contact norm is progressing are not useful.
A contact residual norm begins at a value of 1 and (one hopes) reduces in a controlled monotonic fashion to about <1e-12.
The graph Y-axis (residual norm) axes are 0-1. So after the first few iterations they are all just a flat line and effectively on the X-axis. A log scale would be more sensible.
The graphs are also 'fickle'. Sometimes they work, sometimes they don't and there appears to be no way to modify their presentation.
