When I realize my phone has been out of reach for more than a few minutes my stomach drops because of the chance I've missed some catastrophic work alert that means our company's servers are all down... I probably need a new job.
If you work in IT use something like PagerDuty or OpsGenie and set it to harass you until you acknowledge. Then you don't need to worry about missing something.
Automate all the things.
Seriously only way to manage complex systems with small teams and stay sane. Prioritize automation and monitoring. When you do get emergencies spend the time when you are back in the office to figure out how to improve your processes to prevent that particular problem in the future.
I mean my texts are set to annoy me till I acknowledge them, but if I'm watching TV, in the gym, outside doing some sort of non-tech shenanigans, and I just don't have my phone with me, no amount of alerts will help at that point.
Those are usually the "missed a stair" feelings when I realize I've been without my phone for too long.