Windows 10 Enterprise, version 22H2 is the final feature update for Windows 10. Windows 10 reached the end of support on October 14, 2025. After that date, devices running Windows 10 Enterprise 22H2 no longer receive free security updates, bug fixes, or technical support through the standard lifecycle.
OS Build 19045.6456 is simply one of the cumulative update build numbers released for Windows 10 Enterprise 22H2. The end of support is determined by the Windows version (22H2), not by the specific OS build number. Effectively, your OS reached end of support on October 14, 2025, unless they are enrolled in Microsoft's Extended Security Updates (ESU) program, which provides paid security updates beyond that date.
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hth
Marcin