I can go about a full day before eating without noticing an energy drop. Everyone's different.

I was in my 30’s before I realized that other people really need to eat and can’t just decide to skip a day when work / travel / timezones make it inconvenient. So much natural variation.

This is also something you can train your body to get used to. Anyone who started doing intermittent fasting and struggled at first will know that you eventually adapt to it. Depending on how difficult someone finds it, doing a ketogenic diet might be a nicer way to ease into it.

I find I’m happiest not eating until about 6 pm. Usually one large meal and one small late-night snack. I’m a little surprised there wasn’t much evolutionary pressure to align eating schedules considering how social we are but meh. Maybe everyone being on their own schedule is actually better for survival.