When I was using the default version of Inkscape(1.2),
I had encountered a trouble. The following command ignores any <image href="">
tags(images were disappeared after converted to PNG).
inkscape --export-type=png --export-dpi=200 input.svg -o output.png
After upgrading to the latest version(1.4), the images are shown correctly. Here's the command to install.
add-apt-repository ppa:inkscape.dev/stable
# Press [ENTER] to continue
apt update
apt install inkscape