Currently (2024-02-02), the following ebuilds have old EAPIs within desktop-kit:

 x11-libs/fox-1.6.49
 x11-libs/libGLw-8.0.0
 x11-libs/xbae-4.60.4
 x11-libs/xosd-2.2.14-r1
 x11-libs/xosd-2.2.14-r2
 x11-misc/bbppp-0.2.5-r1
 x11-misc/xstroke-0.6-r1
 x11-misc/xtrace-1.3.0
 x11-terms/mrxvt-0.5.4
 x11-themes/gtk-engines-candido-0.9.1
 x11-themes/gtk-engines-experience-0.10.5
 x11-themes/gtk-engines-rezlooks-0.6
 x11-themes/gtk-engines-ubuntulooks-0.9.12-r3
 x11-themes/nimbus-0.1.7-r1
 x11-themes/tango-icon-theme-extras-0.1.0-r2