Because people aren't going outside at the moment, I can't sell clothes or makeup.
この状態が辛いですね。
もうすぐ解決しますように。
外出 go outside
しないから because ~ aren't/isn't
服 clothes
売れない can't sell
化粧品 makeup
「コロナで外出しないから服が売れないし、マスクで顔が隠れるから化粧品も売れないだろうね」というのは Because people aren't going outside due to the Coronavirus, I can't sell clothes, and as people's faces are covered with masks, I don't think I'll be able to sell makeup either で表現することができます。
参考になれば幸いです。