Ok, thanks for the additional information there.
I guess the thing to consider is the S3 is by its very history, meant for cloud interface standards.
Our API toolkits are very much for managing the systems, not putting data on them - that should be done with the standards compliant interfaces they provide. So we don't provide APIs for putting data on with CIFS or NFS or iSCSI - our systems use those protocols, and the operating system provides the file management facilities that talk over them.
S3 is similar - you should be able to talk to them with the cloudberry explorer, or with the AWS APIs. This is an example hands on lab guide which walks through using Cloudberry with a NetApp StorageGRID system - https://hol.netapp.com/labguides/SL10303.pdf
If you can't use it as directed, there's a problem in your local configuration, and hopefully the team that provisioned your access can assist.
Good luck!