Michail has announced he's not going to be developing Latte Dock in future https://psifidotos.blogspot.com/2022/07/latte-dock-farewell.html Thanks for all your work Michail!
As far as we can tell Latte Dock is a popular Plasma addon. If anyone is looking for a project to take on this is your chance. Otherwise I expect it'll stop working before too long as it uses various private APIs so we'll need to tell distros to stop shipping it when it does. Jonathan