@acebmxer is 10.120.20.119 your xo- proxy ?
I misread your question, you want to exclude the xoa from the process, not the proxy. Today the disk conversion can only be done directly by the xoa.
The data flow is always {vpshere/esxi} => xoa => xcp-ng , with a proxy that can be between xoa and xcp-ng
The only way to handle this without goiing through delilah would be to deploy a second xoa/xoce directly in tilton pool . You can have multiple xoa connected to the same pool.