Usually, but not always.
You’ll probably have the most success if the food is out between dusk and dawn because this is when you’ll trap. The reason to have a feeding station is first to keep your cat from foraging somewhere else; second, to train them to return to a specific location at a specific time so you can interact with them. If your cat is trained to a feeding station, they’re easier to trap. You’ll have the most success trapping at night. However, if the ultimate goal is to meet up with your cat when they come to eat, you can leave food out at any time of day.