Since Debian policy 10.11. released in August 2017, section 2.5 marks the package priority Extra as deprecated. Priority Optional should be used instead.

- -- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (900, 'unstable')
Architecture: i386 (x86_64)

Kernel: Linux 4.19.0-14-amd64 (SMP w/8 CPU threads)
Locale: LANG=fi_FI.UTF-8, LC_CTYPE=fi_FI.UTF-8 (charmap=UTF-8), LANGUAGE=fi:en
Shell: /bin/sh linked to /bin/dash
Init: unable to detect

Versions of packages binutils-i686-linux-gnu depends on:
ii  binutils-common  2.35.1-7
ii  libbinutils      2.35.1-7
ii  libc6            2.31-9
ii  libctf-nobfd0    2.35.1-7
ii  libctf0          2.35.1-7
ii  libgcc-s1        10.2.1-6
ii  libstdc++6       10.2.1-6
ii  zlib1g           1:1.2.11.dfsg-2

binutils-i686-linux-gnu recommends no packages.

Versions of packages binutils-i686-linux-gnu suggests:
pn  binutils-doc  <none>

- -- no debconf information
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that's fixed in the packaging, likely needs fixing in the override file for all
binutils-<target> packages.