Yes its possible
http://server.ch/Windchill/servlet/odata/v5/ProdMgmt/Parts('OR%3Awt.part.WTPart%3A134051')/Representations?$count=false
The result will contains the 2d image information with the download link:
"TwoDThumbnailURL": {
"URL": "http://server.ch/Windchill/servlet/WindchillAuthGW/wt.fv.master.RedirectDownload/redirectDownload/1190782_prt.jpg?u8&redirect=true&ContentHolder=wt.viewmarkup.DerivedImage%3A136870&HttpOperationItem=wt.content.ApplicationData%3A136897&forceDownload=true",
"Label": "1190782_prt.jpg",
"FileSize": 4593,
"MimeType": "image/jpeg",
"Format": "JPEG Image",
"ID": "OR:wt.content.ApplicationData:136897",
"FileName": "1190782_prt.jpg",
"LastModified": "2022-05-10T21:15:57+02:00",
"CreatedOn": "2022-05-10T21:15:57+02:00",
"Description": null,
"Comments": null
}