Is it possible to add support for dark/light mode from ignis for Flatpak applications? When I allow access to “xdg-data/themes” and set the environment variable “GTK_THEME=Material”, the Material theme is applied, but it is always light, no matter what mode is selected.

What's interesting is that the Resources app switches between light and dark mode and is using Material theme, but only if I don't give access to the “xdg-data/themes” folder. If I give permission to this folder, the theme is always in light mode.