I couldn’t find these exact ones but these were the closest I could find.

https://www.wayfair.com/furniture/pdp/latitude-run-warrenton-85-square-arm-sofa-w003577045.html

https://sixpenny.com/products/amelia-sofa-84 this one has multiple fabric options; none that exact color though.

https://www.mgbwhome.com/hunter-studio-long-slipcover-sofa/HUNTER_STUDIO_LONG_SLIPCOVER_SOFA.html

https://www.ikea.com/us/en/p/friheten-sleeper-sofa-skiftebo-dark-gray-90341151/ (orange slip cover for this ikea sofa https://www.amazon.com/CRIUSJA-Friheten-Sleeper-Slipcovers-Cushion/dp/B09K3T88YF)

Edit to add: I would also try looking under the cushions/under the couch for a brand name; there might be tags with the brands name attached to the cushions, etc.

I would be really surprised if the company name isn’t on the couches somewhere (: