My infant is struggling with sleep

My 5 months old baby is struggling to sleep . She doesn’t sleep properly and her sleep cycle is way too short she wakes up every after 30-40 mins even if the room is quite with no noise she doesn’t sleep prolonged same routine is with the night and morning the max amount of sleep she had was 2 hours 3 days back. She is on formula milk drinks properly her weight is around 7.5 kgs. Need suggestions tried white noise , fun activities so that she gets tired and sleep but still

Of no help