On Fri, 3 Feb 2023 at 15:36, someone wrote:
Why is it showing my address? I set it to be hidden.

You were emailing me directly, but you now switched to sending it to the mailing list (so it gets to everyone subscribed).
The name showed in the email is the one your mail client set.
That's completely different to the preference on showing or not the people subscribed to a mailing list.

Regards