https://arstechnica.com/gadgets/2021/11/microsoft-will-continue-supporting-windows-10-with-yearly-feature-updates/

Microsoft is releasing Windows 10's November 2021 update, also called Windows 10 21H2, to the public today. The company is also clarifying its plans for the future of Windows 10 updates: starting now, Microsoft will continue to provide Windows 10 feature updates once per year, rather than the current twice-per-year schedule. This is meant to sync Windows 10's update schedule with Windows 11's, which is also going to receive major feature updates once per year.