Saw an interesting thread which mentioned what to do on Arch:
Adapted from the Arch wiki:
Uncomment the SAL_USE_VCLPLUGIN=kf5 environment variable. This variables can be uncommented in /etc/profile.d/libreoffice-fresh.sh or /etc/profile.d/libreoffice-still.sh
There is no
libreoffice-kde package on Arch-based distros, btw.
get kde theming is just change a script of libreoffice.
just edit /etc/profile.d/libreoffice-fresh.sh (or still) uncheck the # it takes the theme of chosen;
i think is something on manjaro to setup the theming in line
So if you make this change it takes on the default theming in KDE?
kf5 was already installed on my machine so I just needed to uncomment the script as per the arch wiki link in the thread:
For the guys on Arch, read this. https://wiki.archlinux.org/index.php/LibreOffice#Theme
The line to be uncommented in the said file is given below.