Production Reds. Not Rhode Island Reds. They have Rhode Island Red parentage, but they also have New Hampshire heritage, and colours can differ from orange to mahogany. Basically, they're a hatchery strain of reddish birds that has had a strong focus on egg production, and not a lot of focus on temperament.
Welcome! Yes, it's very likely that they are hatchery 'RIRs' otherwise known as 'Production Reds'. They should be very good egg producers, for a year or two anyway. Many of us don't have them in our flocks, because many of them are busy pecking their flockmates way too much.
I hope yours are nice birds for you!