Hello ignusa,
The following provides the different changes you can do to sounds on the iPhone: Change iPhone sounds and vibrations (For iOS 16)
Change iPhone sounds and vibrations
In Settings
, change the sounds iPhone plays when you get a call, text, voicemail, email, reminder, or other type of notification.
On supported models, you feel a tap—called haptic feedback—after you perform some actions, such as when you touch and hold the Camera icon on the Home Screen.
Set sound and vibration options
1. Go to Settings
> Sounds & Haptics.
2. To set the volume for all sounds, drag the slider below Ringtone and Alert Volume.
3. To set the tones and vibration patterns for sounds, tap a sound type, such as ringtone or text tone.
4. 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.
- Tap Vibration, then 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.
As you can see there isn't a setting for Siri Sounds. We'd suggest adjusting the volume on your iPhone with these related steps: Adjust volume on iPhone
If you find adjusting the volume doesn't suffice, then you could provide Apple with feedback about this using the Apple website: Product Feedback
Keep in mind, Apple reviews and considers all feedback provided. If given, you may not hear back about it. Apple does not request unsolicited feedback.
Hoping this helps out, take care.