Hi,
There is not out of box option for ingesting logs located on storage account as the logs stored there could be in any format and structure. In your case I would recommend to enable diagnostic settings on the app service. The log type that you need to enable in your case I think is AppServiceHTTPLogs. With diagnostic settings you will be able to send that log to Log Analytics. Here is example of that log used for troubleshooting. Sentinel uses Log Analytics workspace as platform for saving and storing logs. Any log available in Log Analytics is available for Sentinel as well.
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