What type of smoke alarm do you have in your nation and how is it hooked up? Here in the US it's usually hardwired (with battery backup) for newer homes usually after the mid 90s and newer homes require them IN the bedrooms which is overkill as if you space them properly they are plenty audible without killing your ear drums in the hallway which is most likely where the smoke will go first if it happens at all.
Older homes are usually battery operated or battery wireless like NEST or One Link though I am not sure how often people have those expensive versions unless they want to wire other stuff to it I guess.
Also in most places you cannot have a dedicated circuit though some areas you do I've seen on home building forums which kinda surprises me as usually it's tied to the lighting circuit I believe?
there doesn't seem to be anything here