iOS 15 - List of default apps and bundle ID’s

The list below is based on iOS 15 beta 1.
iOS 15 beta 1 has added the Magnifier app com.apple.Magnifier (https://apps.apple.com/us/app/magnifier/id1563316278)

App Name	| Bundle ID
---------------------------------
Activity	| com.apple.Fitness
App Store	| com.apple.AppStore
Apple Store | com.apple.store.Jolly
Books		| com.apple.iBooks
Calculator	| com.apple.calculator
Calendar	| com.apple.mobilecal
Camera		| com.apple.camera
Clips		| com.apple.clips
Clock		| com.apple.mobiletimer
Compass		| com.apple.compass
Contacts	| com.apple.MobileAddressBook
FaceTime	| com.apple.facetime
Files 	    | com.apple.DocumentsApp
Find My		| com.apple.findmy
GarageBand	| com.apple.mobilegarageband
Health		| com.apple.Health
Home		| com.apple.Home
iCloud Drive| com.apple.iCloudDriveApp
iMovie		| com.apple.iMovie
iTunes Store| com.apple.MobileStore
iTunes U	| com.apple.itunesu
Magnifier	| com.apple.Magnifier
Mail		| com.apple.mobilemail
Maps		| com.apple.Maps
Messages	| com.apple.MobileSMS
Measure		| com.apple.measure
Music		| com.apple.Music
News		| com.apple.news
Notes		| com.apple.mobilenotes
Phone		| com.apple.mobilephone
Photos		| com.apple.mobileslideshow
Photo Booth | com.apple.Photo-Booth
Podcasts	| com.apple.podcasts
Reminders	| com.apple.reminders
Safari		| com.apple.mobilesafari
Settings	| com.apple.Preferences
Shortcuts	| com.apple.shortcuts
Stocks		| com.apple.stocks
Tips		| com.apple.tips
Translate	| com.apple.Translate
TV			| com.apple.tv
Videos		| com.apple.videos
Voice Memos	| com.apple.VoiceMemos
Wallet		| com.apple.Passbook
Watch		| com.apple.Bridge
Weather		| com.apple.weather

Official Apple List:

Previous versions of iOS: