The navigable part of the Strait of Hormuz is only 15-ish miles wide, maybe less. There is no way the US can convoy screen anything without significant loss in sailors and ships.

The WW2 convoy situation was far easier to escort (but still quite dangerous obviously) because:

1. The Atlantic is a much bigger place, even considering common routes and chokepoints.

2. U-Boats had to surface frequently, making them extremely vulnerable to Allied air cover.

3. U-Boats had to be within visual range to strike convoys, versus the drone and missile world we live in now.