The tiny holes are flea beetles, the larger holes are likely slugs or other pest. IMO for just a few egg plants, hand picking works fine on flea beetles. They will still munch some holes, but not enough to hurt the plant. Flea beetles have a very active period, followed by low activity, and then sometimes follow by a secondary wave of increased activity. I watch my egg plants and at the first sign of flea beetles, squish them right on the leaves. That takes about five minutes or less per day for three or four egg plants. You just don't want to get behind on the critters or they can overwhelm an egg plant in a week or two.
The somewhat isolated larger holes IMO are of no consequence. The holes won't hurt the plant, and sharing is a good thing. You may want to have an occasional slug hunt, looking under planters and any area with crawl spaces, and perhaps place a beer trap or two in an area of possible slug activity.
Eclectic gardening style, drawing from 45 years of interest and experience. Mostly plant in raised beds and containers primarily using intensive gardening techniques.