@AsAdmin , Based on my research, we can export the Intune discovered apps information via Apps > Monitor > Discovered apps > Export. To export the report via Graph APIs, we can follow the steps below:
- Use the POST HTTP method on our request. {
"reportName": "DetectedAppsAggregate",
"filter": "",
"select": [],
"format": "csv",
"snapshotId": ""
}

- Use the id field to query the status of the export with a GET request:

- Then we can download the compressed CSV from the url field.
https://learn.microsoft.com/en-us/mem/intune/fundamentals/reports-export-graph-apis
Hope it can help.
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