This isn't currently possible in beorg.
Yes, I want the outline to be expanded when I open the outliner, and want this behaviour for all outlines
as if you set:
(setq org-startup-folded nil) or (setq org-startup-folded 'content) in emacs
Because my todo items are mostly second level, and it's tedious to expand the first level item
Please consider adding this feature to beorg outliner, as controling the visibility is important to an outliner, and I'm very willingly to buy an extension for this feature
Thanks for the additional detail. I will consider this for a future update. It should be a very easy thing to implement, which always makes it more likely I'll get this done.