First, good pretenders including the AI clone government agent. There are other movies/shows that try to get us to accept and humanize AI/robots but Foe takes it to another level. When the "government" knocks on your door, it's rarely going to be for your benefit and the reason they're giving is probably a lie.
The truth is it was probably an experiment to see what happens w/the clone and wife. Can humans actually be replaced by clones that don't carry the baggage from past trauma? Can an AI clone be fooled into thinking it's an Actual person? If they're going off-earth, they'd want the new civilization to be, well nicer and not have the hardness caused by being on Earth to ruin the new place.
Notice the little audience witnessing the clone and Hen's emotional uncoupling scene - and they had champagne served after. Why would they do that if it was just about being on a space station for a year? The real husband probably "thought" he was on a space station but it probably was a simulated one.
For those saying it wasn't like 2065 due to the lack of futuristic technology, just think, back in the day we watched things like Terminator or Jetsons but technology today is not where we imagined. If anyone thought of 2025 in 1989, they'd think flying cars and air travel would be some "beam me up Scotty" type sh.
But no, we instead have hand held computers, 5G internet, which paved the way for AI to be inserted into Everything and us to acclimate normalize so it can become a central, necessary part of our lives in every way possible And imagined to eventually Being a part of us - Literally, instead of just reading our minds to send ads and articles to our online feeds. So, the moral of the story is yes, an AI human clone can learn and mimic emotions and replace human partners.