All depends on whether the new add ons are a red line for Hamas then.
If, as reported on Al Jazeera, netanyahu insists on keeping the IDF inside Gaza during a ceasefire, the agreement is dead on arrival.
Hamas has been reported as saying that they will only agree to the proposal put forward in May- the one Biden presented, and will not accept any new add ons from netanyahu.
Of course, if it fails the US will accuse Hamas of being the problem, when it is actually netanyahu adding unacceptable conditions.
Blinken, IMO, is a stooge for israel and not to be trusted. He's far too cosy with netanyahu.