Those who say they don't worry about things they can't control, how do you manage that?
I allow myself an hour of worry. I go full scale, think of all the worst case scenarios, do anything I can to reduce risk in the circumstances I can control, and that makes me a lot calmer.
For instance I think what if we get bombed/ a storm comes/somebody accidently cuts a pipe and the power gets cut, so I have a bag (I've had it for years, not just for this) with a hand cranked radio and torch, a lighter, candles, other torches and batteries, a first aid kit a couple of charged powerbanks and other bits and pieces that I would need in that event. I also keep spare duvets and blankets.
I always keep the house stocked with enough food like noodles and tinned stuff for about 4-6 weeks (this is actually because I'm a single parent and I worry if something happened that made me unable to go shopping for a week or 2).
I really don't think I'll ever need my emergency bag, but it makes me feel more in control of things, and my food supply came in very handy during the first weeks of covid when shelves were bare, I used things in my house and didn't contribute to the shortages.
Do something about the things you can do something about, everything else isn't worth stressing about because it isn't in our control.