Almost definitely: livers to implant need to be full sized and last years to decades. A test liver could be 1cm2, fit on a microscope slide, and have a two week shelf life.
Not to mention that there is a much higher bar, ethically, regulatorily, and economically for testing a synthetic implantable liver vs a 'liver-on-a-chip'.
Not to mention that there is a much higher bar, ethically, regulatorily, and economically for testing a synthetic implantable liver vs a 'liver-on-a-chip'.