I am trying to execute a simple CPI Integration flow as follows to understand how OData sender adapter works

Below is OData sender Adapter configuration

Below is my receiver adapter configuration

Basically, I am trying to send Json payload from postman to this Integration flow, but I am getting 403 forbidden error.

I am able to hit other iflows with HTTP as sender properly.
My Queries are:
- Is post operation not supported by OData sender adapter?
- If it is supported, is there something that I am missing?
- I am not seeing postman hitting the iflow in monitoring option on CPI, is it because I am using OData as sender here? I can see other iflows with HTTP sender in monitoring.
- I have seen, in some blogs OData sender is being used in OData service created on CPI, does that mean it works with OData service and not the integration flow?
Any help is appreciated!