Yes, that's what Winver will report.....

328054

...though you may not notice any new features. That depends on how many (if any) are currently included (but dormant) in 20H2. Back when 20H2...

Why? 2004 was released on the last Wednesday of May 2020.

327903
https://docs.microsoft.com/en-gb/windows/release-health/release-information

Sounds plausible. Got a source to back that up?

Apparently not. According to the How-To Geek... "...all of the features that looked like they were coming in Windows 10’s 21H1 update have been delayed" and are now pencilled in for 21H2.

How-To...