I'd really like to be able to access the torch/flashlight while the phone is closed.
[Post updated due to new info]
The torch seems like a given as it's something you turn on and off as needs must and if I'm just heading to be I don't want to accidentally blast it at my partner while they're sleeping trying to turn it back off.
You can already access the camera with the phone locked by enabling it in the phone settings. Settjngs>Advanced features>Side key, then enable double press side key to launch camera. I press and hold the side key, with the phone locked, then tell Bixby to turn flashlight on or off. It works every time. Providing you have a data connection.