Printing pages from Odoo result in missing footer and header, as per #977534
and #885833. There is currently no Debian-supported workaround for that, as
Debian does not ship a wkhtmltopdf version built against a patched version of
qt.

wkhtmltopdf's upstream proposes a package[0] that has been briefly
tested and proved to work with 14.0.0+dfsg.2-1 in sid, it is still
still officially considered as unsupported.

[0] https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.buster_amd64.deb

 -- Sebastien Delafond <seb@debian.org>, Wed, 16 Dec 2020 08:17:10 +0100