Yechiel-
1- it’s munitions. Israel was at war and running low on war equipment. US equipment was in Israel stored but not released for them to use. Normally US releases it when Israel needs it. It belongs to USA until released though. Obama explicitly blocked its release when Israel needed it.
2- isreal depends on smart munitions or precise munitions. To a great extent match with it was using in Gaza to limit civilian deaths. Biden’s administration blocked it. Eventually, he released them but only after great delay.
3- as regards what he may or may not do the good thing is he was already president. He was already in a position of responsibility and did more for the state of Israel than any president ever in the history of the United States.
All of this is easily checked fact.