I created a Amazon AWS EC2 instance under my account and made an website/ftp on it, now a new partner wants to move the instance under his company account so his company can pay
there are more than 10 steps involved in doing the cloud move. I would suggest you use Infrastructure as a Configuration (terraform and CloudFormation) or Infrastructure as a real code (pulumi and CDK)
however if you want to give a go at a nice tool I found called KopiCloud. Please feel welcome to try it and leave your comments below. Is good if you need to move instances on a quick lift and shift scenario.