Convert Datatype to Uint32 creates Int32 GeoTiffs


I am attempting to convert the quality_flags band in the OLCI data into a geotiff.

My workflow is: Read -> Reproject -> Convert Datatype -> Write

When converting the datatype of this band to “uint32” (same datatype as original band) the resulting geotiff is of type Int32.

I was wondering if this is a known issue and if there are any workarounds possible.

Where do you see this int32 datatype?
I can’t see it in SNAP and also not with gdalinfo.
This is the gdal report:

The only difference is that I wrote the data to a DIMAP product first and and the exported to GeoTiff.
But I think this doesn’t make difference.