IEC/ISO 17025 calibration: which instruments does it cover?

Calibration covers all Moku:Lab instruments

Calibration is performed on the hardware and encompasses all Moku:Lab instruments.

What happens if I buy Moku:Lab with 17025 calibration, and then later purchase an additional instrument for the same hardware? Do I need to recalibrate?

There is no need for recalibration for new instrument purchases.