You could break that expectation. I personally turn off notifications except for @-ing my name or @channel, and check DMs hourly. It has not been a problem, wel

You could break that expectation. I personally turn off notifications except for @-ing my name or @channel, and check DMs hourly. It has not been a problem, well, people don't DM me as much because I don't reply. Half the time they figure out the answer by themselves anyway. Ideally you could discuss that the notifications are making you anxious and less productive and your employee could accommodate that. If your employer is not interested in helping you become more productive then maybe look somewhere else? You don't have to settle. Your mental health is paramount.