Looking here I have methods for maven but i cant find nuget: https://www.jfrog.com/confluence/display/RTF/Working+With+Pipeline+Jobs+in+Jenkins
How do I use the jenkins plugin to upload packages with Nuget Info attached to them?
The answer is you must use the jfrog cli or the upload() method of the plugin to add build info and do retention. You cannot upload with regular nuget methods.