https://www.israelnationalnews.com/news/391891
...It’s important to note, the hold up was being done quietly, and behind the scenes. That means it wasn’t even being done for political gain - for Muslim voters in Michigan etc. - it was done purely for ideological purposes to hurt Israel...
S2 Underground has talked a bit about this.
The US demands that their customers hold to US standards of targeting. That is why Ukraine was limited in what they could strike.
Israel has not been doing that. That ends up putting some regulatory restrictions on shipment. A nice way to stop arms with out much political involvement