9 months not rolling

Diamond

Hey mommies! My 9 month old who was a month premature is still not rolling back to front… she will roll roll front to back as soon as we put her down… she is sitting up on her own and hitting all other milestones… is this something I should be concerned about… she had an appt today but her doctor’s main concern was her sitting on her own and getting in the crawling position when on her stomach…