It's both. Slightly more than 150 cases of ICE officers sexually assaulting minors, the rest of the cases (out of 4,556 total) are minors sexually assaulting each other. The system is somewhat overwhelmed, but that's also by design in the way the Trump administration did a 180 on the family separation policy far too quickly. Out of all the cases where minors assaulted other minors, I'd have to assume ICE officers were still watching in at least half of those. If you think about it, it's exactly the type of job to attract active and passive pedophile behavior, you're put in a position of authority over children with no outside oversight whatsoever.
I don't trust your sources, this stuff happened under Obama and very little changed. If you really wanted to inspire or cause change, you wouldn't be here. Strap on a sandwich board and walk into busy intersections. Really live your beliefs and people might really start taking you seriously.