Click New Session:

Select File Protocol S3:

Enter the previous generated connection details and Press Save and give it a name:

Press Login and you will see the buckets as in the other tools:

Src:
https://learnoci.cloud/how-to-connect-to-your-oci-object-storage-bucket-from-cyberduck-winscp-commander-one-and-rsync-be9c2f799b7a