The standard "Windows 10 Enterprise LTSC 2021" only offers 5 years of support. The IoT version offers the full 10 years .
If you see 19045 or 19043 , you are on a different servicing branch. Windows 10 IoT Enterprise LTSC 21H2 Build 19044...
AutoTech's successful deployment of Windows 10 IoT Enterprise LTSC 21H2 Build 19044 paved the way for further innovation. The company plans to: The standard "Windows 10 Enterprise LTSC 2021" only
Build 19044 introduces DirectX 12 Agility SDK support. For IoT devices running headless, this is irrelevant. But for medical imaging or casino gaming machines, this allows modern GPU acceleration that the 1809 build lacks. But for medical imaging or casino gaming machines,
Once installed, the device will receive monthly cumulative updates (security patches) via Windows Server Update Services (WSUS), SCCM, or Windows Update for Business, but it will receive feature updates. You are "locked" on Build 19044 until the next LTSC release in roughly 2-3 years.