We are many at the Danish Sonoff forum that misses the LED lights on the Sonoff S20 / S26 and Basic, can be turned off.
It's great that they are lit when you need to pair the device and when the internet connection is failing, but in normal operation, they may very much like to turn off.
The home looks like a server room when all the lights are lit green and blue lights. Black tape does not look elegant either.
Good solutions should work, but not seen.
Hope you can find a solution ....