I'm concluding this is not a feature supported by these switches as no one from TP Link has responded/commented. I also tried HS220 dimmer switches, they don't support this feature either. I've...

@Wipipo thank you for the suggestions. Either I'm completely missing it, or that option isn't available, please see screenshot from my phone for schedule on that switch. Thanks

Hi, I bought the Tapo S505D because it supported Fade On/Fade Off. The goal being to simulate a sunrise in the morning/sunset in the evening - i.e. exactly the description of the lights fading off as...