@FKORPSVART, in Latte Dock version 0.10 you can now get the Deepin V20 floating dock design, take a look at the video below:

https://www.youtube.com/watch?v=ADEWygbPqQw&feature=emb_title

We do not yet have an option to control the size of rounded corners, which is a very important part of the design of floating docks. :(

for clarification, plasma themes support roundness and VERY BIG round corners also,

example, https://github.com/PapirusDevelopmentTeam/materia-kde/issues/71

Yes, thank you, and I know it, I had seen the video before doing the themes, and taking that into account, I opted to make only the version with the style of a bar of windows style and not as a floating dock.

Unfortunately, Latte Dock, as you say, has many limitations, just like Plank Dock, you can not play much with the customization of these Docks, almost everything is said regarding themes in Plank and Latte Docks, except in Latte you can play with the panel customization too, otherwise it is to repeat themes only by changing the colors and sizes. but it's because their styles are quite minimalist.
So I will do the full versions of Deepin v20 for Cairo Dock, which does have a little more configuration options.

Thanks for your comment, d3xt3r. :]

for clarification, plasma themes support roundness and VERY BIG round corners also,

example, https://github.com/PapirusDevelopmentTeam/materia-kde/issues/71

Thank you, @Psifidotos, it's very kind of you.

You know, I've been looking for some information about that, I didn't find many details until you've put this link.

Thank you very much, I'll surely work on that.