Appearance wallpaper not changing when i toggle dark mode

[Geddard]

Here im attaching the images I'm using and the resulting Appearance wallpaper, it seems to do what i need but when i Set it as the wallpaper and toggle dark mode it just never changes to the dark one?

Any ideas what i might be missing?
Should the resulting .heic image be moving when i preview it for example?
I see that if i save the image i uploaded here it saves as .gif but it doesn't move at all.

Im on a m1 macbook air with Sonoma

Here's a recording of the process i took to create it:

Screen.Recording.2024-06-26.at.08.46.44.mov

Light

Dark

Result

[Geddard]

Ok ended up installing Umbra instead, basically the same type of software but it actualyl works :/ sorry to say