We're not yet familiar with Netdata Cloud. Could you describe your requirements in more detail? What are you trying to accomplish?
The installation and use of third-party packages for XCP-ng is described in the following documentation: https://docs.xcp-ng.org/management/additional-packages/
We currently offer a version of Netdata in our repositories, but as a best-effort support option.
If you install a version from another source, this is not supported by us. You must therefore be careful to ensure that what you install does not overwrite or modify packages already present and used by XCP-ng. Furthermore, this will not persist during a server upgrade (a major version change, such as from 8.2 to 8.3, for example), and you will need to install it again, taking the same precautions.