I work in tech and needed to do this as part of onboarding after receiving an offer. Asking during the interview is a little weird but if they’ve had problems where their desired candidate didn’t have the necessary documents then it makes sense. I wouldn’t assume they’re wanting to see your house, they’re likely just wanting to make sure you won’t need H1B sponsorship to get the necessary documents to complete the I-9.
Without a distro to rally behind I’m personally somewhat skeptical. Ubuntu was the best shot we had but since switching everything over to SNAPs it’s on the slow side. With the number of Windows ads and early end of support for Windows 10 there’s a real opportunity for desktop Linux, but until there’s a well supported distro that genuinely doesn’t require using the terminal I can’t see there being mass adoption.