You're presuming he only told the media, which is not what that report says. His team relayed this to Israeli officials:
Biden aide Jake Sullivan, the US national security adviser, is in Israel today and tomorrow for meetings with Israeli officials. He says he held “intense, detailed conversations” with Israeli officials on transitioning away from high-intensity fighting in Gaza, and focusing on more precise battles and targeting top Hamas officials.
Funny how most everyone here assumes the worst of Biden despite all he's doing.