Can Apple set its own SMS ringtone?

Apple's SMS ringtone can be set by itself, and the specific steps are as follows:

Use tips and ringtones on iPhone, iPad or iPod touch.

You can customize the sound, such as phone ringing, SMS ringing and new email alert. There are many sounds on the iPhone, iPad or iPod touch, but you can also buy ringtones and other tips from the iTunes store. The applicability and related functions of stores may vary from country to country. Learn more about your country or region.

Change your ringtone

On the iOS device, go to settings > sounds and touches.

Tap the sound you want to change. You can change the sound of phone ringtones, SMS ringtones, received emails, calendar reminders and other sounds.

Tap the name of the ringtone or prompt to listen to the playback effect and set it as a new sound.

You can also set ringtones or SMS ringtones for specific contacts. Find this contact in Address Book, and then tap Edit in the upper-right corner. Tap Phone Ringtone or SMS Ringtone, then choose a new sound.