A client SHOULD NOT generate content in a DELETE request unless it is made
directly to an origin server that has previously indicated, in or out of band, that
such a request has a purpose and will be adequately supported.
When a user sends DELETE with content this means there is an indication that the server supports this type of requests.
According to the spec https://www.rfc-editor.org/rfc/rfc9110.html#name-delete
When a user sends
DELETE
with content this means there is an indication that the server supports this type of requests.