Hi @graphirancom,
Usually, the calculated expiration date is set to the end of the day of the specific expiration date. In your case, the successful payment date is 2022-08-15 02:50:22. The membership should expire at exactly 2022-08-16 23:59:59. Also, please check the correct configuration of your local timezone on your WP-admin -> settings -> general as it may affect the calculated time.
Best regards,