Is making an IPA possible to extract resources like sound files from AppStore Apps?
Install Apple Configurator 2 from the Mac App Store.
Open it and go to account at the top and sign-in using your Apple ID (the same Apple ID as on your iPhone):


Download the app on your iPhone
Connect your iPhone to your Mac and click Trust on the Trust This Computer prompt and enter your password
Let Apple Configurator 2 load your device as follows:


Go to add then app and select Photo Lab in the list
It will say the app is already installed and will display the following message, don't touch anything just leave the message open:


Go to Finder, go ⇧ + ⌘ + G and paste the following:

~/Library/Group Containers/K36BKF7T3D.group.com.apple.configurator/Library/Caches/Assets/TemporaryItems/MobileApps

Move this to your desktop
Rename the .ipa to .zip and unpack it. The .caf files are in Payload/pho.to.app.

(Alternatively, if this doesn't work you can email it to a Windows computer download 7-zip and extract it there)
Go to the .app file
Look for the relevant files, I looked through all the files and found two of particular interest:

ff7_notification.caf
beuty_notification.caf


I think these are the right files.


To save the hassle I have uploaded them to my Google Drive