It's mobile games models that are very low poly. Pc and console models are not that low poly any more. I had been tasked to evaluate candidates portfolios in the past and it's a hell of an annoying burden usually . They often look perfectly same , tell you nothing about a person as an artist when it's just generic hi res…
For portfolio entries people usually upload high resolution content alongside detailed breakdowns, so is there a reason why you've chosen an optimised route? also yes various workarounds do exist however posting a pic or two would be nice, to enable effective advice instead of guess-work i.e. organic or hard surface...etc?