Warm beeping only stand-up PCs when starting up, no laptops? They are e.g. Threatened by a heat problem?
There's no place for system speakers. There are fewer and fewer motherboards that have one.
In addition, as an end user you can usually not change much anyway, a desktop tower is easier to open and straighten the wiring, install new coolers, replace hardware, etc.
My Acer Swift 3 also beeps when starting up.
Just a note:
POST codes have nothing to do with "heat".
Yes, auto correction or something
Because laptops often don't have a mainboard speaker, i.e. A small speaker for the beeps
