Hi,

To reproduce:

$ sudo apt install lzop
...
$ lzop -9 test.pdf
$ file test.pdf.lzo
test.pdf.lzo: lzop compressed data - version 1.040, LZO1X-999, os: Unix
$ sudo dpkg --purge lzop
...
$ bsdcat test.pdf.lzo
bsdcat: test.pdf.lzo: Can't initialize filter; unable to run program "lzop -d"
$ sudo apt install lzop
...
$ bsdcat test.pdf.lzo > test2.pdf
$ cmp test.pdf test2.pdf


Also, it is a shame that libarchive-formats(5) is part of libarchive-dev
while:
1. to get it by installing libarchive-dev will install a lot of -dev packages,
2. the manpages in libarchive-tools (bsdcat(1), bdscpio(1)...) refers to
libarchive-formats(5).

Finally, the package description does not mention lzo in the supported
compression format
but is one list of README.md (not packaged :-)).
Could be interesting to get it in the result of:
$ apt search lzo
no?

Regards,
Patrice