[Python] Create geojson polygon from point feature collection

I have this feature collection with a lot of points that form a shape:



I need to create a polygon feature collection with this shape, I tried using the shapely multipoint.convex_hull method but the results are way too different from the original shape, which tools or methods can I use to create a polygon from these points?

The polygon I want to generate would looks sort of like this: (don't mind the coordinates, I'll adjust that later):



The inner part is not important for now, I just need the outline

I'm extracting the points from a point cloud file:



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