Here are the docs:
https://docs.idemproject.io/idem-vra/en/latest/ref/exec/cmx/supervisornamespaces.html#idem_vra.exec.vra.cmx.supervisornamespaces.sync_using_post
The source code:
https://docs.idemproject.io/idem-vra/en/latest/_modules/idem_vra/exec/vra/cmx/supervisornamespaces.html#sync_using_post
Maybe worth to create a Gitlab issue at https://gitlab.com/vmware/idem/idem-vra/ or a SR at Broadcom...