Try putting a Villager in a boat or mine-cart and push them through the nether portal while in the Overworld. Once in the nether build another Nether portal a few blocks away and push the villager through the new portal. Once in the Overworld again put the villager in a boat or mine-cart wait about 1 minute to a minute and a half then break the boat or mine-cart. The villager should disappear and you’ll find it back in the Nether near or around the portal.
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Try putting a Villager in a boat or mine-cart and push them through the nether portal while in the Overworld. Once in the nether build another Nether portal a few blocks away and push the villager through the new portal. Once in the Overworld again put the villager in a boat or mine-cart wait about 1 minute to a minute and a half then break the boat or mine-cart. The villager should disappear and you’ll find it back in the Nether near or around the portal.