PUT and DELETE methods return 404 in API Management

Question

In all APIs created in API Management (APIM), resources with PUT and DELETE methods return a 404 error, indicating that the resource does not exist. However, the GET and POST methods work perfectly.

When calling the backend directly, which is hosted on AKS, all methods work correctly.

Even TRACE works on GET and POST, but does not work on PUT and DELETE.

Note: To avoid typos, when testing the same resource that works with the POST method, when switching to PUT, it returns 404.