Glad to help.
For what it's worth, if you are feeding a pellet or flake food, there are automatic timers available that are not all that expensive which can be another option for you all. Again, just separate out the amount of food you want to have fed into the sections and then go about your day.
And, Yes, a healthy fish CAN go a day or 2 without being fed however, an unhealthy fish will struggle at those times and may become victim of a healthier fish in the tank.
There have been many instances where fish get get along fine until the food disappears then so do some of the other fish.