When deleting host using graphical interface -> it shows a "Delete" Action in the audit log.

While using an API procedure:

{
    "jsonrpc": "2.0",
    "method": "host.delete",
    "params": [
        "24883"
    ],
    "auth": "{{auth}}",
    "id": 1
}
 

Host did not appear in the audit log:

Graphical representation: