I can't speak to successful prosecutions because I didn't read literature about prosecutions per se. We need to remember that this offence was only enacted in 2015, so there really is limited evidence about it. What I can say is that charges were slow in coming under that offence at first, and I understand that they have been increasing every year. This corresponds with police training to help them better understand the nature of the offending— what to look for, addressing it, evidentiary issues, etc.
On February 2nd, 2021. See this statement in context.