Despite Isak’s strong interest in a move to Liverpool and his desire which he has shown by protesting and going on strike against his parent club Newcastle United still need to reach an agreement with Liverpool before a deal can happen so they have to wait for Newcastle. I think Newcastle United are seeking a replacement before agreeing to a deal that will see Isak leave the club.
How long before the transfer window shuts down? No news yet on Newcastle and Liverpool coming to a positive agreement, any price bid for the striker is appropriate, this is the most anticipated transfer news i expect to get concluded very soon. If Liverpool don't come to agreement with Newcastle, the season won't be fair for Isak as he already isolated himself from the club and may not be giving the chance to play alongside the team, as his movement was a protest to join another club.
It's unfair, but there's nothing he can do about it. And that's his problem, not the clubs' for not being able to agree with each other. In general, I think this process should have been started much earlier in order to resolve any disagreements that would arise during the transfer process, such as the one we have now. And he has no choice but to wait.