I think a lot of people use the oculus quest in-between work, school or other activities and would like to be able to set an alarm on the quest.

Of course you can set an alarm on your phone but I've got four main reasons why it would be better to be able to set the alarm on the quest.
1. If you use an external alarm while wearing headphones you might miss the alarm.
2. If an alarm is ringing on your (for example) phone you need to take your headset off and turn it off and this is annoying because maybe you want to snooze it or finish a level before you take it off.
3. If you're playing in a public space (and wearing headphones) other people won't be distracted by your alarm.
4. This can help people take regular breaks and stay healthy.

All in all I think this should be an app on the quest that can be installed if necessary and it would be a great benefit for many people. I don't think it's the hardest thing to make a clock app either because it's build in android I think (of course I'm not sure about this because I don't design oculus apps or know anything about the insides of the Oculus quest os) and because of all that a clock/alarm app/feature should be added to the quest.