What are the chances of getting back a green card after being out of the country for 4 years? My partner left with the intention to come back soon after, bought a house there as well just before leaving, but then couldn't come back more than a couple of weeks a year for 3 years, and then not at all for the past 4 years.

We're thinking to move back to the US at some point, so having a green card would be the royal road.

Thanks!

It's likely that USCIS will consider her to have abandoned her green card. There are exceptions when the absence was outside the person's control (like during COVID when travel was restricted and risky). It's probably worth it for her to consult with someone about this. The formal path to find out if she's abandoned her green card is by applying for a returning resident visa at a U.S. Consulate in her home country.