The US Marine Corps CH-53E (3 engine, 1980's procurement) fleet does have folding heads and tails. The CH-53D fleet (2-engine, 1960's buy) was designed with it, but may have been modified to the non-folding rotor head. The 53 is designed to operate off of a ship.
The the CH-47 was never designed to fold. The US Army has figured out how to make it fit best on a ship, but fold and spread is a manual operation requiring a lot of time and a huge deck footprint. I don't see any navy buying them, ever.