Sarahingy

I have twin ( non identical) daughters aged 21 months. As the title suggests they are not walking. My twins were born at 37 weeks 5 days and had a healthy uneventful birth. All development is on track except neither of them are walking yet. Twin 1 is pulling up, cruising on furniture and knee walking. Twin 2 is bum shuffling not pulling to stand and doesn’t bare weight. She has started kneeling and it looks like she may knee walk. Phoebe is the one on the nhs waiting list. We were told they both may have low muscle tone, though no reason was given for this. The physical therapy waiting list is long. I feel so lost. They are missing out on so much? Anyone else have really late