I have a Galaxy Watch 6 and I set my alarm on it when I have to wake up in the morning. However, I also think that Samsung should make it when I set the alarm on the watch, it also sets it on the phone. The reason being, Galaxy Watches have a worse battery life than phones. So if it dies, and I need to wake up, my watch may not be there for me to get the job done. I hope Samsung takes this into consideration to make their products even better.
You could also set your alarm in bedtime mode by adding it to the mode parameters, and then use the wear app to sync modes with phone. Whichever device you use to turn on/off the mode will do the same to the other.
