Are they from a feed store or hatchery, or from a backyard flock? To me they look like Rhode Island red or New Hampshire mixes, with a couple looking like maybe Easter egger mixes. But if they came from a hatchery, they could be some kind of layer strain such as Dixie rainbows.
My reasoning for thinking they are a layer strain is because the birds are different colors, and some of the red hens have a little barring in their plumage. There seems to be a lot different hybrids with the word 'rainbow' in it, and these seem to be a little different for each hatchery. There are Dixie rainbows and rainbow rangers and probably more. I was thinking these birds were something like Hoover Hatchery's rainbows, which are mixed colors, including red barred, and dual purpose: https://hoovershatchery.com/rainbow.html