Environment

Windows build number: [run `[Environment]::OSVersion` for powershell, or `ver` for cmd] 19043.844
Windows Terminal version (if applicable): inbox conhost

Any other software? NVDA

Steps to reproduce

1. Open inbox conhost.
2. Press NVDA+control+z to open the Python console.
3. Enter nav.is21H1Plus

Expected behavior

True is returned, as in OpenConsole commit 12b12d5.

Actual behavior

False is returned, as in 20H2 inbox, indicating a regression from #4495.

Additional context

For testing, I've replaced conhost with OpenConsole on my system, but reverted to inbox before applying the 21H1 update. Perhaps Windows Update didn't install the new inbox conhost on my system?