Excellent list! I want to add a point about keeping people aligned. One thing that becomes very apparent when you lead a group of more than one small team is how you need to communicate everything multiple times, phrase it in multiple ways and blast it through multiple channels. As a former boss of mine once said "if nobody is rolling their eyes you need to say it more often". Even though I intellectually know this I've still had cases that blew my mind where is repeat something I've been saying for weeks and one person is genuinely surprised and calls out how helpful it was to hear this (one might think this was a prank but the person was definitely the opposite personality type for that and sometimes struggled a little with English). This makes that portion of the meeting or email boring and a waste of time for many attendees but there is no getting past it.

Similarly I've had so much feedback that people wanted to have a better idea of what everyone else in the department was working on. So various things were tried. Summary emails, brief section in monthly all-hands, yet many of the same people who asked for it didn't pay attention in the meeting and didn't read the email.