As far as I know there is no way to competently shut the miner off except for physical shut down , the led lights will still work , the fans will still spin (low RPM) but still , and that does add to your electricity bill, and depending on how many miners you have, you could be paying a fortune for that.
The best remote solution for you would be using Wifi smart devices, and you have 2 options.
if you have a lot of miners to shut down, then you can use a smart MCB to control all the miners you need to shutdown, here is an example from Amazon >
https://www.amazon.com/CNZJSC-Circuit-Breaker-Energy-Monitoring/dp/B07Q2QJVPJUsing such a breaker you need to take these two things into consideration.
1- pick the right AMP
2- your router needs to be on a different MCB or else, after you turn everything off , you will have to manually switch it back on.
if it's a single miner, or a few but you want to control each of them individually, you can use Wifi switch >
https://www.amazon.com/Wireless-Control-Household-Appliances-Compatible/dp/B07FZTKZD5you can find those on Alixpress for a lot cheaper, i think 3-4$ each, for S9 running on 220v 10amps would be enough, you can also use this switch with a relay / contactor to control your existing MCB , do the math, if the contactor + wifi switch price is cheaper than the smart MCB then use this method.
I have personally used the second equipment ( different brand but same thing) , you control your stuff using an APP on android and IOS, and you can set a schedule for it to go off and on.