How can i publish my work in Marketplace ? didn’t found any source about it 
On the launcher click on marketplace. Then on the top right you wil see “Submit Content” click that. You will be directed to a part of the unreal website where you sign up to be a seller, make a profile for your seller account and then submit to unreal to be evaluated.
Thank you for quick information 
You bet. For tracking purposes please mark it as the answer so it closes out the question. =)