Background colour in .odt doesn't expor to PDF

Version: 24.2.7.2 (X86_64) / LibreOffice Community
Build ID: 420(Build:2)
CPU threads: 16; OS: Linux 6.8; UI render: default; VCL: gtk3
Locale: de-DE (en_GB.UTF-8); UI: en-GB
Ubuntu package version: 4:24.2.7-0ubuntu0.24.04.4
Calc: threaded

Hello everybody,
I can’t find an answer online, why in writer a background colour that is set in FORMAT/PAGE STYLE/AREA/Colour isn’t exported into a PDF. I do not find any option in the export menu either.

Any idea how to do that? Thx for your time …

Since it works for me (LO 25.8.3.2, but nothing changed in recent releases about this function), attach a sample file for a look.