Anything less than threatening an oil embargo against Israel and its Western allies will likely fail to get the former to open up a humanitarian corridor, but this requires a degree of political will, trust, and coordination between the participating countries that can’t be taken for granted.
"...an oil embargo..."
What a good idea! Strange: it hadn't occurred to me; but, yes — of course — it's a real no-brainer!
That could even get Greta Thunberg's support, so it's just gotta be a real winner!
"...the US is against the formal involvement of any third parties..." [...] "...hence the redeployment of their naval assets..."
Hang on a minute... Isn't that a... Contradiction?
"...that could quickly change if public pressure becomes unbearable..."
Yes, I reckon that could work.