The trailblazers in this are England and, more recently, Scotland.
In England, between the year ending in 2019 and the one ending in 2020, there was a 49% increase in the number of offences associated with coercive conduct. Improvements were made to the law during that period. Almost 25,000 offences associated with coercive conduct were recorded in England.
In Scotland, the law is very recent, dating from 2019. Nonetheless, almost 63,000 incidents of spousal violence were recorded in 2019‑2020. That is an increase of 4%. That's not a major increase, but the law was new. So we see that it has a substantial effect.
For the moment, there has been no effect observed on femicides, but we should remember that the pandemic caused a rise in femicides everywhere in the world, both here and elsewhere. I think more time will be needed to observe differences in this regard.
All in all, there was a definite jump in England at one point. It started slowly and then there was a substantial increase in reports to police.