No Contact - Does It Work?

I’ve been trying No Contact after listening to a really good YouTuber talk about using No Contact as a self-regulating technique to calm down after a breakup and to also give time s d space for your partner to calm down and realise to see if they really miss you and reach out. Can I ask of any stories on No Contact working? And for how many days or months it’s taken in not contacting an ex and then they come back? I’m not asking about narcissists or narcissistic exes, as they always come back to abuse. I’m asking about normal and genuine partners that have broken up with you, but in an amicable way with no drama split-ups that have led to argument. Many thanks.