I mean, it's "IoT", so you could do anything. You could have your workbench lights get brighter when the iron goes off-hook A microscope light turn on. Some soothing music queues up gently as your prepare to fix that 0201 bodge
I've thought about ways to get my hot-air station doing something similar, but the use-case would be far more infrequent. Hence why I added a touch sensor to FumeBuddy - I just touch it to force the fan on when I'm using hot-air.
Yes it can all be done from a PC as well - sometimes I forget about that since I'm typically wired LAN for everything. First-time setup needs something with WiFi, as the ESP32 makes it's own access point the first time you connect to in order to setup the actual WiFi connection from the ESP32 to your home wifi.
It replaces the stands microswitch. Next to the ESP32 itself, those darn OMRON switches are the next priciest thing on the board, and there's two of them so it can work in "dumb" mode.
The basic parameters are beeper on/off, touch switch mode, and how long after putting the iron back until the fan turns off again. That's done via the web portal. Anything else would be coding to implement.