But we see that several players have also rejected their offers because they are still focusing their careers on the European leagues and of course in the highest competition.
Sure. The top players who are still in the golden age like Lautaro Martinez will prefer to focus on playing in the top leagues in the world. Only those players who are not in their best form anymore who consider to move to Saudi. They focus on earning money, they don't really care about their career anymore.
Seeing Lautaro Martinez, of course he is in good harmony with Inter Milan, so he is definitely very comfortable at Inter Milan until his contract ends.
Unless there is an interesting offer from the top clubs, Lautaro Martinez probably prefers to stay. But I'm sure that he is posible to leave if there is an offer form the top clubs like Real Madrid, Barcelona, Bayern Munich, or big clubs in EPL.