How to filter an GI when exposed via Web Service EndPoint?

Hi,

I’m able to use the API to retrieve data from a GI exposed via an extended web service endpoint.

I’ve been following the steps from multiple sources, being this the most complete:

When I try to pass the filter in the body, I get the same results as if I pass a blank body: {} returning all the data unfiltered.

I realized that I don’t have the “filter” option (used in the post above) when I click on Populate, at the top entity level:

I am using Acumatica 2023 R1.
Did this process change in this version of Acumatica?

Am I missing something to configure through the GI instead?

Any help will be much appreciated.

Thanks!

J Chavez