all babies are different. please have some patience. she will roll over at her own pace

dont worry dear u r baby will achieve milestone wait for some more days give lot of tummy time  massage u r baby well

For some babies it takes longer than normal.  according to babychakra tips give the baby lots of tummy time and then get babies eye contact with her favorite toy then gently take the toy and put it on the side so she would try and get it