AWS VPN Client on ARM64

You are correct that currently there is no ARM64 version of the AWS VPN Client for Linux computers. The AWS Client VPN does support Ubuntu 22.04 LTS and 24.04 LTS, but only for AMD64 architecture as you mentioned.

As of now, there is no officially announced timeline for when an ARM64 version of the AWS VPN Client for Linux will be available. AWS regularly updates and expands support for its services, but they have not made any public statements about plans for an ARM64 version of the VPN client.

It's worth noting that AWS does continue to expand support for various operating systems and architectures across its services. For example, they have recently added support for the latest Ubuntu OS versions in AWS Client VPN. However, this support is still limited to AMD64 architecture.

If ARM64 support is crucial for your use case, it's recommended to keep an eye on AWS announcements and updates. You may also want to consider reaching out to AWS support to inquire about potential future plans or to express interest in ARM64 support for the VPN client.
Sources
WANT: Client VPN Endpoint, with Microsoft Entra SAML for mobile devices | AWS re:Post
Virtual Private Network (VPN) – AWS VPN Resources – Amazon Web Services