Role of SAP Gateway OS process in handling ODATA calls

Dear Team,

First of all, I am very new to the Gateway and ODATA services.

I would like to understand how the ODATA calls are handled by Netweaver systems from Firori launchpad application perspective.

In most of the guides, we never talks about the Gateway process, below is my understanding about the connection flow, Is this correct?

Fiori Launchpad (SAP UI5) --> ICM --> Gateway service (OS processes) --> Gateway

ICM calls to Gateway registered programs is handled via Gateway services, right?

Thanks,

Razal