I think this tip will work for you
This is a simple tip on how to auto-connect your iPad with the audio/midi setup.
First, you need to check the “Settings” on your iPad and go to “General” and then “Bluetooth”.
Next, you need to enable “Show Bluetooth in menu bar” on your mac.
Once you connect your iPad to the mac, it will show up in your Bluetooth menu bar.
Then, what you need to do is hold down the option key and select the “Connect” option from the menu bar.