The Catholic Church has issued a warning to its clergy in Washington state: Any priest who complies with a new law requiring the reporting of child abuse confessions to authorities will be excommunicated.
https://www.newsweek.com/catholic-church-excommunicate-priests-following-new-us-state-law-2069039
So it was unclear to me from the article if it simply made priests mandatory reporters or if it went further. My understanding is that mandatory reporters don’t have to report past occurrences specifically. They only havecto report if it is currently happening or they suspect going to happen. If that is the case, it should be fine. Confession isn’t about what you are going to do.
Priests are being made into mandatory reporters in Washington state. In Washington state, the mandatory reporting law appears to require reporting of all past events of abuse - it does not make reference to recent acts or imminent risk.
https://app.leg.wa.gov/billsummary/?BillNumber=5375&Year=2025