I think it's the same as the the result of getnodeaddresses 0 RPC.
Note: it will take a while (GUI will freeze while loading) if you have hundred of thousands of entries in your peers database.
Limit of it is 2500 or 23%, as indicated in the docs. Unfortunately not very useful, because you need the entire peers list to be displayed or at least the relevant parts and not just a sampling. Thanks though!