https://chicago.suntimes.com/pope-leo-xiv/2025/12/04/victims-call-for-investigation-of-pope-leo-xiv-amid-new-evidence-of-role-in-sexual-abuse-cover-up-in-peru here's one article.
my search strategy was running the search "pope leo history sex abuse scandal" without the quotes. A number of articles came up, some relevant.
https://www.latimes.com/world-nation/story/2025-05-24/as-pope-leo-xiv-faces-scrutiny-victims-of-abusive-catholic-group-say-he-helped-when-others-didnt Another article.
https://snapnetwork.org/ https://www.bishop-accountability.org/ These are the organizations mentioned in the two articles linked. Snap network has a news section that might help you find new terms for searching. It updates frequently, and I got rapidly depressed going back through it and stopped before 2025, when some of this discussion seems to have happened. the bishop accountability website has an easily searchable news section, so I could put "pope leo" in as a term and quickly come up with relevant results. It defaults to google, but site: works on other search engines, so I tried "pope leo site:https://snapnetwork.org" without the quotes to find the news articles on that site.
I hope that gives you at least a baseline of information to search for what you want to know. I hate when I want to learn more about a subject but can't figure out how to start looking, so wanted to try and help. If this was unhelpful, feel free to disregard.