just glanced through this tutorial and spotted a possible bug:

https://github.com/mne-tools/mne-python/blob/e65a55965958829a0cfc66d45a57175214241d16/examples/io/read_impedances.py#L43C1-L74C11

shall visualize first and last impedance measurement (2 topoplots from data in a list of dicts), but if i see correctly the same data is plotted twice.
will open a PR soon