I did DF EBM in a bottle with Oscar from around day 10 or so, every single night till we stopped DFing at 10ish months.
Once weight gain is on the up, you can comfortably express and then get thro the early hours of the night comfortably and latch is good, I seriously don't see why not!
With Emma, it was complicated...but we also tried and then gave up around the 6 week mark. But still, I went to bed at 8pm, DH brought her to me for breastfed DF and then did nappy and resettle himself....those hours really do make a difference xxx