Unable to find Bird chirping alarm on my iPhone 15 Pro

Wondering if you have tried scrolling through all the sounds available:

If not: Change iPhone sounds and vibrations - Apple Support

says:

:Set sound and vibration options

Go to Settings > Sounds & Haptics.

To set the volume for all sounds, drag the slider below Ringtone and Alerts.

Tap Haptics, then choose the haptics behavior for ringtones and alerts—Always Play, Play in Silent Mode, Don’t Play in Silent Mode, or Never Play.

Tap Ringtone or Text Tone.

At the top of the Ringtone or Text Tone screen, tap Haptics, then do any of the following:

Choose a tone (scroll to see them all).

Ringtones play for incoming calls, clock alarms, and the clock timer;

text tones are used for text messages, new voicemail, and other alerts.

Choose a vibration pattern or tap Create New Vibration to create your own.

You can also change the sounds iPhone plays for certain people.

Go to Contacts, tap a person’s name, tap Edit, then choose a ringtone and text tone."

The author asked about Alarms and what you provided doesn't address that at all.

For alarms, you use the Clock app to set the sound. This link from Apple explains more --> How to set and change alarms on your iPhone - Apple Support

Whether there is a bird chirping sound for alarms anymore, I don't know. Apple made some changes to ringtones and sounds when iOS 17 was introduced. If chirping birds isn't there, then Apple removed it.

Thank you kindly for your opinion, lobsterghost1 :-)

You're welcome!