Bub has just gone 6 months and is starting to roll in her cot. She likes to bed wrapped very tightly for her sleeps and if an arm or 2 get free she wakes throwing arms and kicking. I’m unsure on what is the best first step as she sleeps thru the night and has since birth and I’m hesitant to change what works for her but also know if she does roll over will need her arms free. My son was a natural tummy sleeper as soon as he was unwrapped & this stopped his kicking and throwing of arms I feel like she would do the same and get a much better sleep but tummy is not coming naturally for her so know I shouldn’t encourage it, what do you suggest?

It is important that the wrap is removed once your daughter looks like rolling or is rolling.
As you have said, babies need their arms free to roll safely.
Red Nose actually recommends to have baby’s arms out of any wraps at 3 months in preparation for rolling.

Modify the wrap to meet the baby’s developmental changes, e.g. arms free once ‘startle’ reflex begins to disappear which is usually around 3 months
https://rednose.org.au/article/wrapping-babies

Red Nose has the following information now that your baby is starting to roll.

Give baby extra tummy time to play when awake and supervised as this helps baby to develop stronger neck and upper body muscles which in turn enables them to roll back over.
Make sure that baby is on a firm and well-fitting mattress that is flat (not tilted or elevated).
Make sure that baby’s face and head remains uncovered (do not use lambswool, doonas, pillows, cot bumpers or soft toys)

As babies grow and develop they become very active and learn to roll around the cot.
At this time, continue to put them on the back at the start of sleep time, but let them find their own position of comfort.
By this stage it is not necessary to wake during the night to turn baby over to the back position

Do not use any devices designed to keep baby in a particular sleep position.
https://rednose.com.au/article/what-do-we-do-now-that-a-baby-has-started-to-roll-over
https://rednose.org.au/article/is-it-safe-to-use-products-designed-to-keep-baby-in-a-particular-position