Q.transplanting a butterfly bush
Can I transplant a butterfly bush using cuttings?

If you're simply wanting to transplant the bush, this article will help: https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/tips-for-transplanting-a-butterfly-bush.htm
If you're needing information on growing butterfly bush from cuttings, then this article should help: https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/propagating-butterfly-bush.htm
If growing from cuttings, keep the rooted bush in a container for at least one growing season before planting out to ensure a stronger root system for survival.