Well well well, the anglophone rulers rear their ugly heads. Appointing shadow cabinets, critics if you want, is a proud tradition in Westminster Parliamentary Tradition. What do I mean by this? From GPT:

The appointment of shadow cabinets—or critics—is a longstanding tradition in Westminster parliamentary systems. It involves the opposition party assigning members to "shadow" government ministers, holding them accountable and presenting alternative policies.

This practice doesn't apply to the United States because its system is based on the separation of powers. The executive and legislative branches are distinct, and there's no formal "opposition" in Congress tasked with directly shadowing cabinet members. Instead, checks and balances operate through congressional oversight committees, which perform similar accountability functions.