But only due to HIBP integration in browser's password manager many come to know about their account leak even when the company which was breached didn't disclo

But only due to HIBP integration in browser's password manager many come to know about their account leak even when the company which was breached didn't disclose it (as is the case in most countries). There's still a need gap to detect leaked file data online, Say after a ransomware attack our files end-up in pastebin[1]; currently there seems to be no way to know unless manually monitoring sites where leaked data is posted or for the attacker to themselves let you know. [1] Added in my profile.