After win 10 sets the sleep time, it will automatically return to the original sleep time after restarting the computer.

It is estimated that you have installed software such as Master Lu, and there is energy-saving refrigeration in temperature management. Once you turn it on, it will automatically set your sleep time. After you modify it, restarting it will automatically help you restore your original sleep time, so you just need to turn off energy saving in the software. Use the system's own schedule, and then adjust the sleep time to never.