Answer

In principle, repentance is required for each sin. This includes verbal confession (saying the sin out loud). However, in my article on repentance I wrote that if a person undergoes complete repentance, it helps for all sins together. But that usually does not happen.
See here: https://www.google.com/url?client=internal-element-cse&cx=f18e4f052adde49eb&q=https://mikyab.net/%25D7%259B%25D7%25AA%25D7%2591%25D7%2599%25D7%259D/%25D7%259E%25D7%2590%25D7%259E%25D7%25A8%25D7%2599%25D7%259D/%25D7%25A2%25D7%259C-%25D7%2594%25D7%25AA%25D7%2595%25D7%2591%25D7%2594-%25D7%2591%25D7%2599%25D7%259F-%25D7%2598%25D7%259B%25D7%25A0%25D7%2599%25D7%25A7%25D7%2594-%25D7%259C%25D7%259E%25D7%2594%25D7%2595%25D7%25AA/&sa=U&ved=2ahUKEwjb2fu2ud2DAxUIcKQEHewRAoAQFnoECAIQAQ&usg=AOvVaw10Eo1jC5BTRS0pLcUdSoyC