hi I start using latte-dock with kde and I have this promblem. I add application launcher but when I right click to an app the submenu does’n show “add to desktop” option, Is there a solution to it?

It hasn’t been maintained anymore in almost a year. The most recent version was built on 2022.12.02. As an alternative, you can use a Plasma panel instead. It allows most of the same functionality.