I've noticed this for a few releases but forgot to file an issue. There are files from etc/pam.d/ leaking into the the lib32.txz release set
Also /usr/libdata/pkgconfig, /usr/include/rdma, /usr/include/infiniband and /usr/lib/clang, at least for the 14.0-CURRENT snapshot currently available for amd64. % curl -sL http://ftp.freebsd.org/pub/FreeBSD/snapshots/amd64/amd64/14.0-CURRENT/lib32.txz | tar tJ | grep -v '^\.\/usr\/lib32' | wc -l 233 (then subtract 2 for ./ and ./usr as expected entries in that output, not worth filtering further just for them)
Well, the -i386 libs in /usr/lib/clang are expected, but not the sanitizer headers.