They haven't been pushing hard enough. The US gives Israel billions in 'aid', and that is definitely leverage that they haven't been willing to use. They're just leaking stuff about Biden 'being frustrated with Netanyahu' and whatever, but there's no evidence of the US daring to touch aid, conditioning aid or even following the US' own laws regarding human rights when providing weapons (you might remember the state department employee who quit in protest over that).
They're just sitting by while Israel is blocking food aid and is preparing to commit a massacre in Rafah.
As for student loans: it's a lot less than what they could've done if they just did a blanket forgiveness, because of the asinine fear of forgiving the loans for someone that is somehow undeserving (like fictional billionaire's children who wouldn't have needed to take out loans to begin with).