I will close this

1) My note had the wrong coordinates so I changed the coordinates in Wikidata, Järfälla kommuns coordinates and Open Street Map are the same
2) added the WD reference on https://www.openstreetmap.org/node/11663123669#map=19/59.404827/17.766465 and the picture
3) will feedback the work you have done to Järfälla kommun if we find mismatches plus that we would like to see open data from them see https://github.com/dpriskorn/svenska-grillplatser/issues/5#issuecomment-2373121894