Having difficulties in establishing a Kusto cache

I've followed the https://learn.microsoft.com/en-us/azure/data-explorer/kusto/query/query-results-cache#results-from-the-cache, docs for caching POC. I attempted to set the cache parameters using "set query_results_cache_max_age = time(30m);" and "set query_results_cache_per_shard," but even after running subsequent queries, I couldn't observe any caching in the "ExtendedProperties" as indicated in the "Results from the cache" section in the documentation.

Please find snapshot for the same -

 

Could someone please guide me on how to effectively utilize this feature? Additionally, I'm aware that Kusto has built-in caching capabilities, but how does this particular caching mechanism differ from the built-in one?