A few more things you can check then is to pull back the SRID and WKT from HANA and check to make sure it's in the correct projection and if the coordinates are converted properly during the append tool. You can use a query layer from ArcGIS pro something like: select OBJECTID, SHAPE, SHAPE.ST_SRID(), SHAPE.ST_ASWKT() from <your table> and make sure the SRID and WKT is looking exactly as you expect. If everything looks the correct, then the data is all correct from the HANA side. Perhaps then its a line thickness issue in ArcGIS pro (as it is not something stored on the HANA table side)?
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