Rumor: According to Polish insider Cyberpunk 2077 delay because Xbox One (current gen base console)

[HollyGamer]

Mr Puggsly said:

HollyGamer said:

And that require more resource on time, money and people. 

Not necessarily time, Switch version could see a delay. But more money/people? Yeah, no shit.

That's why Switch ports are kinda rare. It does take extra resources to create.

The bold part is the reason why    

Also if it's include another studios it will be one package (more people to work , more money to pay the worker and more time for porting the games). Hell even without using third studios to port it still add extra time and development process.