/etc/fonts/conf.d/89-tlwg-umpush-synthetic.conf is in fonts-tlwg-umpush 1:0.5.1-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /etc/fonts/conf.d/../conf.avail/89-tlwg-umpush-synthetic.conf
/etc/fonts/conf.d/../conf.avail/89-tlwg-umpush-synthetic.conf