We are making a request to the Eikon symbology API almost exactly as per the example in the "Tutorials/Symbology" section here: Symbology Tutorial.
The only exception is that we are requesting a RIC rather than an ISIN.
When we use RICS such as "A", "HD" and "AAPL.O", the data returned does not include a SEDOL. However, looking at these symbols through Eikon, the Codes and Schemes section of the instrument Overview shows a SEDOL.
Is this the expected behaviour? Is there any way to reliably get SEDOLs for these RICs?