I've tested this with NVDA - confirming exactly as described on 102.1.0 (64-bit), Win10. My NVDA has CapsLock as NVDA key.
For testing, it doesn't matter if there's text on left side of status bar, because both before and after the patch of Bug 1777184 Unread and Total counts are inside the status bar and should always be read.
Spaces Toolbar is shown, NVDA key +
End reports "No information in the status bar" (bug on 102.1.0).
Spaces Toolbar is hidden, NVDA key +
End reports all elements of status bar starting from
Show Spaces Toolbar Button.
On Daily 105.0a1 (2022-08-01) (64-bit), NVDA key +
End always reports "No information in the status bar", regardless of
Spaces Toolbar shown or hidden (worse bug on Daily).
Works on 91.11.0 (32-bit), Win10 -> regression.