Microsoft will be releasing the Windows 10 21H1 feature update, aka the Spring 2021 Update, in April or May as an optional update, with it more broadly being released later in the year. The Spring 2021 update is not a very exciting release with a lot of new features. Instead, it is being released as a minor update with bug fixes, and a few improvements to existing features targeted to business users. Microsoft will do this through updates from the Microsoft Store or via ‘Windows Feature Experience Packs,’ which is a new way to deliver updates for standalone features outside of the regularly scheduled Windows 10 updates.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-21h1-update-whats-new-how-to-download-and-more/