AWS EKS multiple node running but i wand to run single node

AWS EKS i am deploy karpenter and knative, now 3 aws ec2 instance or continually running due to aws, eks, weebhook, proxy related multiple pods running inside node, i wand to move all the pods in to single ec2 instance and i wand to terminate balance 2 ec2 node to save cost, how to do that ?

using nodeSelector and move some pods to Main EC2 instance but i can’t able to move the Daemon Sets running pods.