을 겪고

… experience and

→ 을
phrase Uncommon #7,562
… experience and 을 marks the preceding noun as the object of 겪다, meaning “to experience” or “to go through.” 고 connects this action to what follows.
KO: 그는 많은 어려움을 겪고 성장했어요.
EN: He grew through many hardships.

모험을 겪고 피곤한 걸 수도 있어.

You might be tired from all the adventures.

샤론만 빼고 샤론은 임신 우울증을 겪고 있었어

Everyone except Sharon—Sharon was suffering from depression during her pregnancy.

— 원스 어폰 어 타임 인… 할리우드 (2019)