Did they all sell? Were they pinioned? They have to be pinioned to be legal, plus if not pinioned, when mature, it's likely they will just fly away. My adult pair are pinioned but they still can walk a good distance and go to the back of our place to the other pond. We had to change the fence on the back to keep them from leaving our property and going to the neighbors pond too.
They normally stay right in the yard or on one of 2 ponds in the yard and one outside the fence by the yard. They're very happy, they just like to roam. They graze out with the cows and horses sometimes. Mine are very much pets and eat from my hand and follow me around when I do chores. I've had Rachel for a few years but Regis for only coming on 2 years in the spring, they are both DNA sexed but it can take a year or more to bond enough to nest.
I have an adult pair and hoping they will nest in the spring. I'm in the Ozarks too, north of Springfield