I need help

my daughter is 5,5 months.

She used to sleep a whole night without waking up to feed for a week before she turned 5, now she came back to waking up once for feeding.

Also, She does not sleep on her own, when she was really small we put her in the crib and she would fall asleep, now we need to either hold her (only hold, not moving) or put her in the stroller and go for a walk so she fall asleep.