Fish can survive a decent amount of time without food (i think they can even go something like a week?) but you could also get an autofeederhttps://www.petsmart.com/fish/food-and-care/feeders/ani-mate-automatic-aquarium-fish-feeder-5037273.html
Certain rodents you also can in which case the real problem isn't food but water. Bunnies, guinea pigs, hamsters etc. so long as they have enough water and a big bowl of food you can leave them alone for several days and it'll be fine. I have rodents it just makes me nervous being gone too long in case they somehow knock out the drip water soon after leaving but I'm also paranoid. And regarding fish they seem like low maintenance pets but they're really not. You end up having to do water changes every week unless you get a specific kind of planets aquarium set up, and just getting the thing to the point of equilibrium is challenging and time consuming.
And if you got a pet snake which is super low on both the companion and interesting to watch scale, that you can feed once only once a week and pretty much ignore it. Same goes for lots of reptiles.>>3191
Oh yeah also spiders.>>3195
Kotlet also needs way more affection and is almost a 3D animal. Even if a spider or hamster got loose, there is only one plane they can go on to get in trouble, the floor. A bored cat can go everywhere but the ceiling. Although I suppose it won't get in much more trouble than if you're gone a day for work. If you just gave them enough water they could be fine (seriously the main issue is water most animals you can get away with not feeding even a human can be literally starved for a solid week and physically be fine but you WILL die in 3-4 days without water).