It would be a good improvement to add a new Service Broker for OData which support the Version 4 because the current only support the Version 3. Further this new Service Broker should can handle Request and Response in JSON and not only in XML.
Because e.g. the Service Layer (OData Service) from SAP Business One supports OData Version 3 and 4 but this only handle Requests/Responses in JSON and not in XML. So it would be a good improvement for the Product if the newer OData Version will be supported out of the Box and this can handle both XML and JSON Requests/Responses.
It also would mean better integration with D365. We use Finance and Operations and have to use the REST broker because of the OData broker still being on v3. The REST broker loses us the functionality of the OData queries e.g . $filter etc. and therefore some things we have to use PowerAutomate to do instead. So I'm all in favor of this one as would create more value for our business and enhance our customer onboarding process.
This idea is open for voting, please vote if this is something that would be useful for your organization, and add a comment for what systems you would want to integrate with via OData v4. Thanks!