No, you've picked up some inaccurate information there. (There is a lot of it around!) Almost none of babies on the indictment would have been treated on the downgraded unit
Once downgraded, the unit was not allowed to accept babies under 32 weeks' gestation, multiple births, of infants born after complex pregnancies.
So this means, out of the seven deaths:
Babies A, E, O and P wouldn't have been there (multiples)
Babies C and D wouldn't have been there (complex pregnancies)
Baby I - the medical team agreed she shouldn't have been transferred so much, so I doubt they would have been transferring her to a level 1 unit.
So six wouldn't have been there, one uncertain.
Out of the babies allegedly harmed:
Babies B, F, L and M wouldn't have been there (multiples, with the alleged incident shortly after birth)
Baby Q wouldn't have been there (too premature)
Baby G would certainly not have been there so soon. Her parents recalled that they were happy with her level 3 care, but Chester was agitating to have her moved back to them at level 2 (financial implications)
Babies H and K would likely have been born there because baby H was a sudden deterioration of later gestation baby and baby K was an emergency birth. They would have been transferred out as soon as possible since both needed mechanical ventilation and Chester now had only one emergency ICU cot. So baby H would have been gone before the first alleged incident with Lucy Letby. Baby K was transferred out quickly and died, but this wasn't alleged to be murder.
Baby J was a multiple with alleged incidents later in life than babies B, F, L and M. So perhaps she would have been transferred to a level one, but to one not used to handling stomas? Seems unlikely.
Baby N had haemophilia which again, the unit struggled to handle. Unlikely he'd have been transferred there as a level 1. He certainly wouldn't have been born there - complex pregnancy.
So six or seven out of the seven babies who died would not have been born or treated there.
It's a more mixed picture among the babies allegedly injured, but six out of ten would definitely not have been there. Four at most might have been. And of course, there's no reason to believe that "collapses" like these children's didn't continue after the downgrade anyway. Nobody is counting.