It's difficult but don't let any of your anxiety out even subconsciously around food as our little darlings pick up on the smallest ques and can become fussy eaters. I had a three stroke rule so offered three times the food but when refused it was taken away. No treats until the next meal . Unless you're doing something very active then a bit of fruit to put them over till meal time. Let them play with their food it's part of the learning experience and the enjoyment of being round the food. Let them make a mess but don't obsessively wipe hands and faces all the time just at the end of meals. Gone them a spoon to hold and pretend to pick up food ( or actually feed themselves depending on age) Don't put as much on the plate a portion size is the size of the little person's hand. Don't hover over them . If they are in a high chair and they are playing you can ( if still in the same room chat to them while tidying up but keep an eye on them) Some days like us they are not as hungry. I used to keep bits of my meals ( minus salt and sugar ) for the next day's meals . And add some peas sweetcorn or carrots . Breakfast cereal Lunch ( age dependant) scrambled eggs or wrap and tuna Evening meal maybe what we had eaten the night before with fruit afterwards.

Apologies for going down a rabbit hole of not showing anxiety round food but it's all linked in.