Endpoints from OpenAPI 3.0 endpoint not available

Summary

When I create a service connection based on an OpenAPI 3.0 JSON specification document, the services are not available on a page

Content

We have a number of services, some Auto-Rest and some custom REST services.
From the Auto-Rest services, we exported the OpenAPI (swagger 2.0) definition and converted it to OpenAPI 3.0 JSON format.
For our custom REST services, we dynamiccaly generate the OpenAPI 3.0 JSON document.

When we create a STATIC service endpoint based on a URL that serves the OpenAPI 3.0 JSON document and Copy full OpenAPI to the application selected for the Metadata Retrieval Option, the endpoints are available on any page.