Is there no longer a remapping cost for Elastic IPs?

You are correct in noticing that the remapping cost for Elastic IP addresses is no longer mentioned in the AWS VPC pricing documentation. Based on the current information available, there is no specific remapping cost mentioned for Elastic IP addresses.

However, it's important to note that AWS does charge for Elastic IP addresses in certain situations. Specifically:

1. You are charged for all Elastic IP addresses that are allocated to your AWS account but not associated with a running instance. This applies even if the Elastic IP is not actively being used.

2. You can have one Elastic IP address associated with a running instance at no additional charge. If you associate additional Elastic IP addresses with that same instance, you will be charged for each additional Elastic IP on a pro-rata hourly basis.

3. There is also a small hourly charge for Elastic IP addresses that are not associated with a running instance, or when they are associated with a stopped instance or an unattached network interface.

The remapping process for Elastic IP addresses, which takes several minutes to propagate through the AWS system, is not explicitly mentioned as having a separate cost.

Regarding Carrier IP addresses, which you mentioned are discussed in the EC2 On-Demand Pricing section, these are a different type of IP address used in AWS Wavelength Zones. The pricing structure for Carrier IPs is separate from Elastic IPs and includes charges for additional or unused addresses.

To avoid unnecessary charges, it's recommended to release any Elastic IP addresses that you no longer need, especially if they're not associated with running instances.
Sources
EC2 On-Demand Instance Pricing – Amazon Web Services
Amazon EC2 FAQs – AWS
Elastic IP addresses - Amazon Elastic Compute Cloud
Generating Amazon EC2 estimates - AWS Pricing Calculator
Start using Elastic IP addresses - Amazon Virtual Private Cloud

For Wavelength IP remapping pricing, refer to: https://aws.amazon.com/cn/ec2/pricing/on-demand/#Elastic_IP_Addresses

For AWS EIPs, I don't think there are any remapping fees. All the public IPs(Include EIPs) are to be charged. https://aws.amazon.com/vpc/pricing/