Examples of cells that have engulfed other cells, and then had the ability to recreate both itself and the engulfed cells faithfully? Where? If you're pointing

Examples of cells that have engulfed other cells, and then had the ability to recreate both itself and the engulfed cells faithfully? Where? If you're pointing to mitochondria, there's only science fiction wild theory that has no evidence unless you like to believe Alex Jones theories. It's far more likely that it developed organically from within, like how real science believes, ie. evolution. You have to remember that engulfing another organism is not even 10% of the job here. It needs to be faithfully replicated when the cell divides. To just assume that another organism can be engulfed and then the cell magically can figure out how to recreate an entirely new copy of it from within itself is absurd.