Isak still wants to leave Newcastle. In addition, they've also started looking for an offer. I think they did this intentionally. They wanted to wait until Liverpool and Arsenal buy someone else for the centre-forward position. They don't want to sell him to a rival.
Yeah, i have heard that too. Isaak's move to the Liverpool is most likely possible as he also wanted play for the reds. His problem is his club that is not willing to sell him. Money ain't the problem for his club, but selling him to the rival is gonna be their worst blunder.
He asked his team to explore the way he can move to Liverpool, but it most likely his club prevent it. He's still under long term contract with Newcastle, which is still three years away.