default alarm sound in Clock App on iPhone is set to none when I as Siri to set the alarm. How do I change the default?

Did you know when I ask Siri to create an alarm, the default alarm sound on iPhone 15 is set to "none"? When I create it by hand, the sound is set to whatever the previous sound I selected. When I searched this forum for how to change the default sound, it took me to Sounds and Haptics, but there's no setting for alarm sound in the Clock App there. Please help. Thank you.