Opening app

When I first bought my pro 2 years ago, I had a feature that would automatically open the camera on my app when motion was detected. I switched this off after a month but I wanted to set this up again but for when my doorbell is pressed as it often takes so long for the app to respond that I often miss who has rung me. I cannot find this option anymore NBA’s it been removed? It was definitely there doe motion alerts and I can’t find that either.