Dear Chris,
Thank you for bringing this into limelight.
I recently attended KubeCon + Cloud Native Con in Austin, where we had a diversity lunch, the idea behind this event was to meet new people and talk about a common topic in groups for example, how they started contributing to open source. Althought, the discussion doesn't have to revolve around this topic exclusively. I connected at a personal level with ~6 other attendees from different parts of the world in around 30 minutes. I felt that this was a great idea to know one another and make each other feel included at the conference.
I also attended DebConf in Montreal which was my first DebConf! Despite being a newcomer, I felt welcoming when I interacted with a few Debian contributors :)
Having significant amount of mentor - mentee sessions and beginner level talks at the conferences could also be a great way to start with.
I believe, there is scope and need for more inclusion. For that, thank you for talking about it.
Cheers!
Urvika