You can turn off the sleep monitoring function on the Apple Watch S8, so that the bedtime won't ring. You can turn off the sleep monitoring function according to the following steps: Open the "Health" application and click the "Sleep" option; Find the "Parameters" option under "Sleep State" and click Enter; Under the "Parameters" page, just turn off the "Automatic Sleep Monitoring" option.
When turned off, Apple Watch S8 will not monitor sleep through vibration/sound reminder. After the sleep monitoring function is turned off, data such as sleep quality cannot be obtained. To know the sleep data, you can check it the next morning.