Since you've already checked the settings and restarted both devices without success, there are a few additional steps you can try to troubleshoot the connection issues. First, ensure that both your iPad Pro and M1 iMac are updated to the latest versions of iPadOS and macOS, respectively. Apple often releases software updates that include bug fixes and improvements, which could potentially address connectivity issues with Universal Control.
Next, try restarting your network router or switching to a different Wi-Fi network to see if that resolves the connection problems. Sometimes, network issues can interfere with the communication between devices, leading to connectivity issues with features like Universal Control.
If the problem persists, you can also try forgetting the Wi-Fi network on both your iPad Pro and M1 iMac, then reconnecting to it. This can sometimes reset the network connection and resolve any underlying issues that may be affecting Universal Control.
If none of these steps resolve the issue, it may be helpful to contact Official Apple Support for further assistance. They can provide more personalized support and guidance based on your specific situation and may be able to offer additional troubleshooting steps or escalate the issue if necessary. Additionally, you can visit an Apple Store or authorized service provider for in-person support if needed.