How can I use Semantic Kernel to call an OpenAI chat completion (gpt-4o, in my case) which is behind an API Management instance?

If such usage of Semantic Kernel is possible, I'd really like a code snippet to help with this specific use case (I've experienced with other use cases).
I found related issues (#2744 and #5763), but their included links don't work anymore.

To be honest, I'm not even sure what endpoint url and api key should I use.
For the time being, I tried the url (redacted) marked in the image, and the api key of the OpenAI service itself, but it doesn't work.