Keep your eye on this, both the Bab-El-Mandeb Strait and the growing use of drones not only to attempt to enforce or break a blockade... but to attempt to run the blockade as unmanned cargo vessels themselves.
There is an abundant amount of public information on long range cargo unmanned surface vehicles (USVs) and unmanned underwater vehicles (UUVs). In particular the US Orcas is of note.
https://en.wikipedia.org/wiki/Orca_(AUV)
The basic Orca design shares a 51 feet (16 m) length with Echo Voyager, but the Orca will incorporate a more modular construction, primarily for the capability to be built with an additional payload module of up to 34 feet (10 m) long and a capacity of 8 tonnes (8,000 kg) for a total length of 85 feet (26 m).[3][6]
It is reasonable to expect that at least one major naval power in the world right now is demonstrating the ability to run blockades with logistics using UUVs and/or USVs. It likely isn't cost efficient yet, it likely will never be more cost efficient than a big old boat... but it is entirely possible right now and there is every incentive to do it. The only question is the specifics of capability build out among the major naval powers of large unmanned cargo UUVs and USVs, which isn't something that is public information beyond broad brush strokes so all we can do is speculate broadly.
My reasoning? What has happened to logistics in the land war in Ukraine? UGVs have proliferated in dangerous logistical situations, and for good reason, it is the perfect job for robots to tackle... so the next obvious question on everybody who is in positions of power to influence this kind of stuff has to be... what is the naval equivalent?
also see https://gcaptain.com/cargo-ship-destroyed-in-new-attack-off-yemen/
https://www.seatrade-maritime.com/security/unmanned-cargo-ship-destroyed-off-yemen