Description of problem:

When attempting to connect to a DevSpaces workspace from a Mac using VS Code “Remote – SSH”, the SSH authentication succeeds using the provided private key, but the VS Code server fails to start with the following error:

[13:05:44.186] Unsupported architecture
[13:05:44.186] Terminating local server
[13:05:44.187] Exec server for ssh-remote+localhost failed: Error: The remote host's architecture is not supported
[13:05:44.187] Error opening exec server for ssh-remote+localhost: Error: The remote host's architecture is not supported
[13:05:44.187] ---------- [Session Summary] ----------- 
[13:05:44.187] [UnsupportedArch]: Error: UnsupportedArch (The remote host's architecture is not supported)
[13:05:44.187] ---------------------------------------- 
[13:05:44.190] Local server exit: 15

This occurs because the remote workspace is running on s390x / ppc64le architecture, which is currently not supported by the VS Code Remote-SSH exec-server.

Steps to Reproduce

1. Follow the DevSpaces instructions to port-forward the workspace to localhost.
2. Configure VS Code Remote-SSH with the provided user, port, and private key.
3. Attempt to connect.

 Actual results:

Connection fails with Unsupported architecture error.

Expected results:

VS Code should successfully start the remote server and allow workspace access.

Additional info (Such as Logs, Screenshots, etc):

Related Github Issue
microsoft/vscode-remote-release#6994
microsoft/vscode-remote-release#6693
microsoft/vscode-remote-release#703

prak@redhat.com reproduced the same issue on IBM Power as well,
Error: "UnsupportedArch (The remote host's architecture is not supported)".