egl-gbm not available in runtime
WebKitGTK requires the egl-gbm package (or equivalent) to display web content with the new DMABUF renderer on Nvidia hardware. However, this package is not available in the Gnome Flatpak runtime. As a result, WebKitGTK applications like Gnome Web show a blank WebView when run inside a Flatpak. The Gnome Flatpak runtime should include the egl-gbm package (or equivalent) so WebKitGTK works correctly on Nvidia hardware.