Windows 10 Enterprise LTSC 2021 is new version of Long Term Servicing Channel for Windows 10 which is built on Windows 10 Enterprise LTSC 2019 and consists of tool set equivalent to Windows 10 version 21H2.
Windows 10 Enterprise LTSC 2021 IoT still gets 10 years of support until 2026 by Microsoft but not available as a retail version.
Core advancements in LTSC 2021 version of Windows 10 are summarized below
Advanced SMM Firmware Protection built to minimize the firmware attack surface-higher level of System Management Mode (SMM) powered by Windows Defender.
Azure Active Directory to support Mobile Device Management (MDM) alongside Bitlocker with enhanced protection to ward off accidental password disclosure via a new key-rolling feature that secures to recover passwords in MDM-managed devices.
Administrators to proactive web protections to switch between allow and deny lists for URLs and IP addresses which reduces Attack surface area.
Microsoft Defender is isolated by Virtualization-based security for Endpoint safety from the potential attackers based on OS aka Tamper-proofing capabilities.