The following year, he participated in the Junior World Championships in Soldier Hollow, Utah, and once again secured a medal with the relay team.

Taking advantage of the absence of most top athletes at the Norwegian Championships, Øverby won bronze in the sprint and with the relay team.

In his debut in the IBU Cup, the Norwegian immediately showcased his skills, finishing among the top five in all four races he participated in.

In Ridnaun, he secured his first title in the pursuit event, and in Osrblie, along with two more podium finishes, he followed up with another victory in the single mixed relay.

However, his first European Championships did not go as planned, and at the season finale in Canmore, he started with diminished strength due to a bout of coronavirus and fell to fifth place in the IBU Cup standings after relatively weak results.