What is customize provider in OpenAI block, tried to find on the website, but nothing about it

Context? Where did you see that? If I had to guess, it's referring to making changes to the model, etc.

It’s useful if you’d like to use Azure OpenAI

I would like to confirm whether or not the OpenAI block works with current iterations of Azure OpenAI. This is a feature I am exploring and my initial attempts were not successful.