Boruto: Naruto Next Generations Episode 221 was aired next Sunday, 24th October!
Preview of the next episode (from the official website: https://www.tv-tokyo.co.jp/anime/boruto/episodes/):
At the suggestion of Naruto, the seventh Hokage, it was decided that the “Chunin Exams” would be held for the “Genin” of the village of Konoha Kagakure. The purpose of this test was to cheer up the people of the village who were feeling uneasy after the Ishiki’s attack. All of them are determined to show the results of their training and the experience they have gained by completing numerous missions with their teammates. Who will be promoted to the rank of chuunin?