Could I please have some advice?

I’m seeking some advice. I recently ended my relationship with the father of my children after a tumultuous four years filled with ups and downs. Our issues stem from his ongoing use of pornography, adding women on Facebook and Instagram, and actively searching for other females nearby, including subscribing to their OnlyFans accounts. I also discovered that he has been spending significant amounts of money on cam sites while I’m at home with the kids. What’s troubling me is something I found while using his work laptop—a device where I came across email receipts for live webcam sessions. I noticed he had searched for "dark web" in his recent Google activity. While my knowledge on the dark web is limited, I understand that it's associated with illicit content, including pornography and drugs. It appears difficult to access and requires special downloads. Although there’s no proof he actually visited those sites—his browsing history was cleared except for the search terms—I can’t help but worry, especially given his deep-seated porn addiction. I typically wouldn’t go to the police unless there was a clear indication of someone being harmed, and right now I have no solid evidence—just a mounting concern. When I brought it up after our breakup, he brushed it off and made me feel ridiculous for even mentioning it. I’m looking for guidance on how I might investigate this further without tangible proof. He primarily uses his phone, which I can’t access, and he also has a VPN installed. I truly dread the thought of making unfounded accusations, but this keeps weighing on my mind, especially now that we live separately and I have no access to his devices. I’m a 29-year-old female, and he’s 28. Any advice would be greatly appreciated.