I may just be to cynical at this point but I don’t trust that at all. It’s just a pause.
Biden has structured that block as a “Type 2” decision. It creates the illusion of standing up to Israel but it allows him to instantly and unilaterally completely reverse it as soon as public attention has shifted.
Given history, I expect that’s exactly what will happen. Once the IDF murders enough people in Rafah, they’ll be “done”. Then they can pretend that they’ve turned over a new leaf and definitely won’t do any more genocide. Biden will congratulate them and resume all the weapons shipments, including sending the stuff that’s currently being held back.
Short of restructuring this as a “Type 1” decision, there’s little reason to think this is anything beyond theatrics.