Usually luxury stores have sprinkler protection, availability of fire hose reels, etc.

In Australia this would not comply with our fire code. Putting it behind a cabinet is fine; but it must have visible signs that can be seen from 20m away with a 20/20 eyesight (assuming no obstruction etc).

This applies to all portable extinguishers; even if it’s additional ones you’ve added beyond what’s required. The idea and intent is simple: train people and first responders to locate portable fire extinguishers by the sign.