Swagger UI does not show file upload option (and not only that) in OpenAPI 3.0.3 Request Body info - swagger-ui

Question

I was trying to add a file upload option for a POST request in Swagger UI by following the documentation.
The problem is this:
As you can see, Swagger UI does not render anything, neither for textual inputs nor for file inputs.
I tried to search on SO other answers about this but nothing.
This is the request body that I defined for the requestBody parameter of the path:
CreateTicketMessagePayload:
description: |-
Request multipart body required to proceed in the ticket message creation processes.
**Object part**:
```
{
"message": "Textual content of the message",
"private": "Flag that indicates the message is visible just for technicians"
}
```
**File part**:
"attachment": Message attachment file.
content:
multipart/form-data:
schema:
type: object
properties:
message:
type: string
example: This is a message
private:
type: boolean
example: false
attachment:
type: string
format: binary
What am I doing wrong?

Answer 1

In case of multipart/form-data requests, Swagger UI shows the inputs after you click "Try it out".
There's an existing enhancement request to display the inputs by default:
Display static documentation information for multipart properties in OpenAPI 3.0 files