How can we call the drain mode API for each instance of the Function app in Kubernetes running on version 4?

Hello Experts,

Could you please help us with the query that we have?

#### Is your question related to a specific version? If so, please specify:
--> Function app in Kubernetes running on version 4

#### What language does your question apply to? (e.g. C#, JavaScript, Java, All)
---> C#

#### Question

I have questions if there's a way to call the drain mode API for each instance of the Function app in Kubernetes Version 4 ?

Also, as we know To call any Admin API, it is required to pass the master key in the HTTP request and to enable drain mode through the function's API, as this is a standard way supported in public Azure Functions as well."

Please guide us on the above ask.

Thank you for help in advance!!!