The 2015 ACE 27.1 we just purchased (used) did have the gas struts located under the storage hatch under the mattress. They look original but it is possible that they were added by the previous owner (if so, thanks) There are 3 chambers available when you lift the platform. the platform is very heavy to lift even with the gas struts.
The generic owner's manual is very confusing as it mentions things we don't have and ignores features we need more info about.