It’s hard to say whether that’s enough without knowing the amount fed versus your bio load.
Skipping days between feedings is a very common practice.
I have skipped multiple days when taking weekend trips without any problem.
I usually feed frozen and pellets daily.
When I feed pellets, I use the same pinch I’d use for salting my own food (very small).
When I feed frozen, I put a splash of R/O water in a tiny tuperware, put a cube of frozen food in and refrigerate. Then, each day, I use a 1/4 tsp (1 ml) measuring spoon, stir it up, and add about 5 spoon-fulls to the tank.
I have a 90 gallon system full of corals, 10 fish, two small anemones, 8-10 emerald crabs, about 15 hermits, 2 conchs, 10 snails, and a very modest amount of cheato in my refugium.
I add a squirt of Oyster Feast to my frozen food and broadcast feed ReefRoids once a week to keep PO3 up.