Greetings acccha,
We can understand the concern the concern of not having the battery widget for the Powerbeats Pro show on the iPhone. We're happy to help you with this.
"On your iPhone, iPad, or iPod touch
- Make sure that your Powerbeats Pro are turned on and paired with your iPhone, iPad, or iPod touch.
- Place the earbuds in the charging case. Keep the case lid open.
- Hold your Powerbeats Pro within 2 inches of your unlocked iPhone, iPad, or iPod touch.
- On your iOS device, a card appears that shows the battery level.
You can also see the battery level in the Today View on your iPhone, iPad, or iPod touch. Learn how to add the Batteries widget to your Today View."
You'll find additional information here: Charge your Powerbeats Pro
Let us know if you have any questions.
Best regards!