Dappled sunlight is a poor choice for intimate portraits.
Look again at the last one. See that bright highlight on the side of his nose? Did you notice your eye is almost immediately drawn to it?
You didn't number the photos but there is another with both their faces lit by direct sunlight and they are squinting and we can't see their eyes.
In summary, I recommend you spend some time investigating photographic lighting techniques. As a case on point, no one else mentioned using a diffuser to create your own portable open shade so you can avoid those harsh highlights caused by dappled sunlight.
Dappled sunlight makes it difficult to make well lit portraits. Putting your subjects just inside the edge of open shade so there is a dark background, and using the open sky as the light on your subjects works much better.