Please stop accusing me of lying, when I clearly explained to you how said roadmap was obviously just a high level overview of AMD products, and as such didn't account for every product.
You're the one pretending that the roadmap mentioned Vega 20 specifically, when it obviously didn't (it didn't mention any specific products, only the Vega architecture as a whole). The only time Vega 20 has ever been mentioned specifically is in connection to 7nm.
AMD making high level slides like this that don't account for every single product within a series is nothing new. For instance when they introduced RX 580, they had a number of slides about the new 500 series, which among other things
said that the series was made on 14nm, but of course we know that the 500 series also contains 28nm products. All this means is that these kind of slides shouldn't be interpreted all that strictly.