I highly recommend watching this documentary I found it really, really interesting. Almost all the aspects of 9/11 get highlighted, they day itself, what were the events 'leading' to 9/11 and what happened after 9/11, invasion of Afghanistan, Iraq and the years after till now. A really 'honest' documentary about all the atrocities and bad decisions that were made in the aftermath of 9/11.
Pretty interesting ! I recently watched this one from National Geographic : https://www.nationalgeographic.co.uk/911-one-day-in-america and i highly recommend it if you want to see some "never seen before archival footage"