I’ve installed the nightly release of GitHub - t3mujin/t3mujinpack: Collection of film emulation presets for open-source RAW developer software Darktable. using Darktable 4.6.1. I can see the styles in the Lighttable view, but almost all of them only have a tone curve(0) operation, which doesn’t look very useful. Is that expected? I would expect more tweaks.
There are also channelmixerrgb changes in the b/w modules. which additional settings do you expect?
Stuff like white balance changes, color saturation, etc. I was curious about the Kodachrome one, but after applying it the effect was not noticeable.
Have you tried the 3d lut approach?