If you get an untethered box you can purchase a cable of any length. I have a 10 metre one, which means I don’t have to rely on parking in the correct spots in car parks, ideal for where arseholes park inconsiderately. It also means I can keep box installation simpler and use cable length rather than having to bury a cable to install the box closer.
I'm Autistic, if I say something you find offensive, please let me know, I can guarantee it was unintentional.
I'll try to give my honest opinion but am always open to learning.
Mark