Your first pic looks a lot like my ikea couch, which I think they’ve discontinued because I was looking for new covers for mine. Ikea isn’t Italy though.

All that says is the legs are made in Italy. The sofa could have been made anywhere.

Did you check inside the covers of the cushions for any tags?

Only pillow have tags Superlon

but it doesn't give any results

I'm thinking of the first B&B in Italy, but they have different legs on the sofas

I don't think anyone can possibly tell you with any degree of certainty who made that sofa.

Why would you want to know?

I agree no way to answer and why is it important?

Because I want resell

If you want to be totally honest, leave out the manufacturer in the description/listing. If it were a sofa with any kind of provenance, it would be noted somewhere (George Smith, Herman Miller, etc.) But it looks like a run-of-the-mill piece of upholstery.

Or you could make something up--who would say you're wrong ;)

If the piece were high end, it would say. I buy furniture resale online often. For the most smooth process, simply show all the pictures you have posted here, include all measurements, and describe with honesty what you do know about it.

The upholstery does not look like any Italian made sofa I have seen it lokslike somewhere down the road someone did cheap reupholstery job so selling it is okay but do not expect big bucks and pretty sure just the legs are made in Italy not the sofa