Hi the_demiurge,
Thanks for contacting Apple Support Communities!
We understand that your iPad doesn't notify you of calls when the call comes through to your iPhone until later.
Is this happening while you're connected to a specific network? Do you experience the same behavior if you connect to an alternate network?
Do you happen to have any security or VPN software installed on your iPad? We ask because it could impact the network connection as outlined here: Check VPN (Virtual Private Network) and third-party software to help resolve network connectivity issues - Apple Support
"Check basic settings on your device
Start by checking some basic settings:
- Make sure the date, time, and time zone are set accurately on your device. Learn how to set the date and time on your Mac, iPhone, iPad, or iPod touch.
- Make sure your device's software is up to date. Install any available software updates and then restart your device.
- Restart your modem and router.
- Try switching to another network. If your connectivity issue is resolved by joining a different network, check with your Internet Service Provider (ISP) or network administrator to make sure your network is working properly for the features and apps you want to use.
Check for VPN connections and third-party firewall or security software
Some types of software, including VPN apps or configuration profiles, may have settings or restrictions that can cause connectivity issues. Types of software that could affect connectivity include:
- VPN (Virtual Private Network) apps
- Managed configuration profiles
- Firewall apps
- Anti-virus apps
- Parental control apps
- Content blockers
Review the apps on your device to see if these types of apps or configuration profiles are installed.
On iPhone, iPad, or iPod touch, scroll through your installed apps and check for VPN software or configuration profiles in Settings.
- Settings > General > VPN (even if it says Not Connected)
- Settings > General > Profile (if this option doesn't exist, profiles are not installed)
On Mac, check your Applications folder in the Finder and check for configuration profiles in System Preferences > Profiles.
If any of these types of apps are installed on your device, you may need to delete them to resolve the connectivity issue. Use caution if you choose to do this, since deleting an app or changing a configuration profile could affect how you use your device. For example, if you delete a configuration profile installed by your organization or school, your device may not work with that network.
Use caution if you choose to delete VPN apps or other software
Before you delete any software, you may want to contact the app developer for more information about how the app works with your network, and whether it could cause connectivity issues. For configuration profiles, contact the system administrator for the organization or school that asked you to install it.
On iPhone, iPad and iPod touch: Learn how to delete apps and configuration profiles. If you delete VPN, security or networking apps, also reset your device's network settings.
On Mac: Learn how to delete apps and configuration profiles. If you delete VPN, security or networking apps, you may need to take additional steps. Work with the software developer to fully uninstall their software. Then restart your Mac.
Third-party software might have a subscription to access certain features or services. If you don’t plan to keep using the software, make sure to cancel your subscription."
You could also try togging Calls on Other Devices in the Settings of each device off, restart the device then enable Calls on Other Devices again. This resource will show you how to set up calls on other devices and manage their settings: Make and receive phone calls on Mac or iPad - Apple Support
"Set up iPhone Cellular Calls
Make sure that your Mac, iPhone, and iPad meet the Continuity system requirements.
Your devices must also be near each other and set up as follows:
- Each device is signed in with the same Apple ID.
- Each device is signed in to FaceTime with the same Apple ID.
- Each device has Wi-Fi turned on.
- Each device is connected to the same network using Wi-Fi or Ethernet.
- On your iPhone, go to Settings > Phone > Calls on Other Devices, then turn on Allow Calls on Other Devices.
- On your iPad, go to Settings > FaceTime > Calls from iPhone, then turn on Calls from iPhone.
- On your Mac, open the FaceTime app, choose FaceTime > Settings (or Preferences), then select Calls From iPhone.
If your carrier supports Wi-Fi calling on other devices, you can set up those devices to make and receive calls even when your iPhone isn't turned on or nearby. Learn about Wi-Fi calling."
If you're still unable to receive notifications on your iPad for calls, we'd suggest that you contact Apple directly to investigate this further with you. You can find their contact details here: Contact Apple Support
Take care!
