There is a difference between a teenager who does chores when asked and one who owns something. The first is labor; the second is a transfer of responsibility, and only the second reduces anyone's load.
Ownership needs a boundary
"Help around the house" cannot be owned because it has no edges. "The trash and recycling, including knowing which week is which" can. The scope is finite, the standard is checkable, and success does not depend on someone else's judgment of effort.
And it needs to be visible without nagging
A chore that only exists as a parent's reminder is not owned — the parent is still doing the remembering, which was most of the work. Move it somewhere the teenager can see it themselves, and the reminder becomes the system's job rather than a relationship transaction.
Then hold the standard and let it fail occasionally. A missed week that has a visible consequence teaches more than a rescue does, and rescuing quietly takes the ownership back.