SK-Go/SK-Mini can still start it's initial print without theses parts. Below are some workarounds if you don't have them printed.
A ruler or caliper that keeps dimensions consistent will work.
Temporarily hold wires/cables onto sticks.
Driver cooling fan mount
TMC drivers still work without a fan and they auto reduce working current if overheated.
Part-cooling fan duct
A desktop fan placed by the printer will work.
X-min sensorless homing bumper
It still homes without this bumper, just noisier.
12864 Display cover
The display still works without a cover.
Filament sensor holder
Temporarily turn sensor off in the display menu, or put a piece of filament in the sensor to emulate filament always exists.