Latest snapshot build of Cyberduck supports OCI Object Storage since ticket #10194.
It works however when downloading files from Object Storage to local folder, it gives the following error after the download is completed.
Unknown application error. No enum constant ch.cyberduck.core.s3.S3Protocol.AuthenticationHeaderSignatureVersion.AWS4.
Download succeeds and the file is copied to local destination if you simply cancel it. If you retry it, Transfer windows turns to red stating it is 0 bytes and "Incomplete" (downloaded file stays, uncorrupted).