Update: In the BrainHack23 Toronto, @likeajumprope and me managed to achieve the following:
Found a publicly available dataset on OpenNeuro to finally demonstrate a full processing pipeline,
Get PhysIO and a basic preprocessing pipeline running, up to the F-test statistical parametric maps that show where in the brain the noise models explain signal variance (see screenshot below)
All code is in a dedicated repository. now we can continue to try out the model comparison.