How to check if there is any land for sale in Animal Crossing?

By talking to Nook.

After the campsite is built, you can talk to Nook and choose "Sell Land" to reserve housing land for the new animals.

The full name of "Animal Crossing" is "Animal Crossing", which is a game series developed by Nintendo. In the game, players live in a village where animals live and carry out various activities. The series is known for its openness and use of real time. There are twelve games in the series, including five orthodox sequels, namely Animal Crossing, Welcome to Animal Crossing, Animal Crossing: City People, and Come on! Animal Crossing, gather! Animal Crossing. As of April 2020, the total global sales of the series (excluding mobile games) exceeded 41 million units.