/usr/share/kservices5/qimageioplugins/ is in libkf5kdelibs4support-data 5.18.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/kservices5/qimageioplugins/bmp.desktop
/usr/share/kservices5/qimageioplugins/gif.desktop
/usr/share/kservices5/qimageioplugins/ico.desktop
/usr/share/kservices5/qimageioplugins/jpeg.desktop
/usr/share/kservices5/qimageioplugins/mng.desktop
/usr/share/kservices5/qimageioplugins/pbm.desktop
/usr/share/kservices5/qimageioplugins/pgm.desktop
/usr/share/kservices5/qimageioplugins/png.desktop
/usr/share/kservices5/qimageioplugins/ppm.desktop
/usr/share/kservices5/qimageioplugins/svg+xml-compressed.desktop
/usr/share/kservices5/qimageioplugins/svg+xml.desktop
/usr/share/kservices5/qimageioplugins/tiff.desktop
/usr/share/kservices5/qimageioplugins/wbmp.desktop
/usr/share/kservices5/qimageioplugins/webp.desktop
/usr/share/kservices5/qimageioplugins/xbm.desktop
/usr/share/kservices5/qimageioplugins/xpm.desktop