@NelOh This is the Adobe unified experience that comes with the Adobe Admin Console, it's not a universal dark mode for Workfront. Still does not exist as far as I'm aware and need to use a 3rd party browser app to get a Dark Mode Workfront.
This requires a user to collapse it, this is not automatic. Is there a way to have it collapse by default/automatically based on Layout? I tried to do something similar via groupings but it's messy as it includes the parent task with "No Value"