Welcome to Oxwall.
Go to admin->users->profile questions
you can drag and drop questions where you would like them to be, also make new sections and lots of other options.
https://developers.oxwall.com/forum/topic/35576
As suggested in this post you could try using get_defined_vars() to see what is loaded but it will take some searching.
You can check out
php file:
ow_system_plugins/base/controllers/user_list.php
and html file
ow_system_plugins/base/views/controllers/user_list_index.html
Check this out...
Go to Admin -> Profile Questions -> For birthday, you edit it and go to 'Answer Type' -> choose 'Date (Age) -> then show age on your users profiles.
I know its not on the members list but at least its somewhere.
Took awhile, sorry but i am not feeling too good today. But i did find in
ow_system_plugins/base/bol/user_service.php
the function starts on line 1647
and the age code is on line 1805
im not sure about its full process but it could be what we are looking for.
remember that any changes you make will need to be redone after a update