Here are two ways to delay the Windows 10 May 2021 Update installation

[Windows Central]

The Windows 10 May 2021 Update is here, but if you want to wait, it's possible to delay it in at least two ways.
The May 2021 Update (version 21H1) for Windows 10 is now being offered to compatible hardware and software configurations as an optional update with a small scope of improvements and features.

Full story from the WindowsCentral blog...

 

[Lee_Bo]

Updated my laptop and Intel NUC. Going to update my security camera DVR computer later tonight.