For visibility into Linux IoT firmware contents, you can upload the public firmware binary for any IoT device to the Microsoft binary analysis service. This free service is based on their acquisition of ReFirm Labs Binwalk Enterprise.
> Firmware analysis takes a binary firmware image that runs on an IoT device and conducts an automated analysis to identify potential security vulnerabilities and weaknesses. This analysis provides insights into the software inventory, weaknesses, and certificates of IoT devices without requiring an endpoint agent to be deployed.
https://techcommunity.microsoft.com/t5/microsoft-defender-fo...
> Firmware analysis takes a binary firmware image that runs on an IoT device and conducts an automated analysis to identify potential security vulnerabilities and weaknesses. This analysis provides insights into the software inventory, weaknesses, and certificates of IoT devices without requiring an endpoint agent to be deployed.