Just lemme make sure I've got this straight: your friend posts her entries to LJ, then regularly imports them into her DW account, and you have her DW account in your circle?

If that's correct: Imported entries don't show on reading pages, mostly because if they did, I could (accidentally or deliberately) dump two thousand entries on your reading page just by importing and push off everything else that would otherwise be there. So unless your friend does switch to using Dreamwidth's native crossposter to post to LJ, you'd have to make a feed account for her public entries, and you won't be able to see her locked entries. (See me explaining that process here.)