Cyberpunk2077 took 9 years to develop. Game full of bugs after the released. Even with Big Giant studios and 350 million dollars of funding.
Cyberpunk is using REDengine architect. Which is just a refurbished/remodelled Engine they use to make The Witcher 1-2-3.
Dayz wrote its engine architect from the ground up. While also having to develope the game from the ground up. Competlely new engine, unlike Cyberpunk 2077 that has been resuing its engine for the last 20years.