Dear Ritesh, a friendly reminder about this bug and the associated patch.
libnss-unknown is the last package in Debian that does not use the dh_installnss and modifies /etc/nsswitch.conf via maintscripts.
The patch at https://salsa.debian.org/debian/libnss-unknown/-/merge_requests/4 (refreshed for 0.0.2-3) fixes this issue.
Could you please merge this and upload a new package, so that the transition to dh_installnss will be completed in time for Bookworm?
Regards, -- Gioele Barabucci