Microsoft Defender has key improvements for IOT in version 22 as noted below

Microsoft Defender for IoT Version 22.1 Commercially Released —

Microsoft this week announced Microsoft Defender for IoT version 22.1 at the “general availability” (GA) commercial-release stage. Microsoft Defender for IoT (formerly known as “Azure Defender for IoT”) is a “network detection and response” service for Internet of Things (IoT) devices, operational technology (OT) and industrial control system devices. It works with other Microsoft security solutions, such as Microsoft 365 Defender, as well as Microsoft Sentinel, Microsoft’s security information and event management product. Version 22.1 of Microsoft Defender for IoT is GA release, which means that it’s supported for nine months, according this Microsoft document. Organizations have to move to a GA release to continue to get new functionality in the product under this nine-months-of-support scheme.