Custom alarm sound for Sleep | Wake-up

Hey!

Just created a custom alarm sound and so far I've managed to use it as sound for normal alarms but the reason for making it in the first place was because I wanted to use it for my wake-up alarm and I'm not able to use it there.

Here is it in the normal alarm, available as a choice. Please do ignore the name of the alarm, it's just Steve Harvey on repeat saying "it's going to be a great day"

But when I go to "Sleep | Wake-up", I can't find the sound there.

Any idea how can I make it be available there ? Or, it's even possible ?