I've been to some places where smoke detectors aren't required by law (or places where it is required by law but there isn't anyone to enforce it). It's weird AF.
I remarked to a friend of mine who is a contractor how crazy it is that we're all used to smoke detectors and fire extinguishers being around that we're caught off guard in other countries where that isn't a thing.
One of the first projects when we bought our new house was to replace all the smoke alarms with smoke and carbon monoxide alarms and replace or introduce a fire extinguisher everywhere that needed one. It was a little expensive when it all adds up but well worth it.