Isak, 26, had been in negotiations with Liverpool all summer to secure his move from Newcastle.
The club eventually paid £125 million to sign him, and he has since made six appearances across all competitions, scoring one goal.
Isak has been keeping a low profile since joining Liverpool, focusing on getting back into shape after missing pre-season training with his new teammates.
In a recent interview, Isak reflected on his adaptation to life in Liverpool, saying: "Great so far. A great team and a city where the team has a good relationship with the fans. It's been great so far."
Isak is currently with the Sweden national team, preparing for upcoming matches against Switzerland and Kosovo, which he hopes will help him get back on track.