On a fresh bookworm install gwenview (with no existing configuration)
fails to render any of the in-app icons or thumbnails for directories or
images. This is reproducable across the i3 and xfce4 windowing
environments as well as the app itself forwarded on an X-over-SSH
connection.

This could be from not having the full KDE environment being installed
but I assumed the app would still install requirements.

gwenview is still usable to an extent but much slower to navigate with
all the missing UI and images.

Note I have the nvidia drivers for CUDA stuff but the primary GPU is an
Intel iGPU (and as mentioned this is reproducable over remote X
connections where the GPU is not involved).