Is it only my baby?

Melissa • 👦 12|30|15. 👧07|10|20. 👼 12|18|20. 🌈👶💙 10|11|21. 👼01|17|23. 🌈👶💗11|23|23

My 6 month old little mama has been crawling backwards for the last month, my son never did that he went straight to crawling at 7 months. Is this normal ?