Re: How can I auto-populate a profile field in Buddypress?
If it’s on registration, work with a child theme as described in this thread: https://buddypress.org/forums/topic/adding-some-text-to-the-signup-form
Then just prepopulate the fields (assuming it’s static info for all registrants) using standard forms HTML stuff.
If it’s dynamic info, well, same first step, but after that, I’m out of my depth! 
