Oh, no place to sign up. You'd want to check out different Italian real estate websites (here's one that specializes in it: https://renovita.net/ )

In order to qualify for the tax rebates you'll need to be a tax-payer in Italy, but with the new digital nomad visa that's easier to do. So, I'd recommend securing either the nomad visa, or one of the other many Italian visa options, then once that's secure you can check out the properties.