He wants him as a leader for the young drivers from the academy.
So in the end Vettel can be back in F1 the following year.
Source: https://www.formulapassion.it/motorsport/formula-1/marko-vettel-red-bull-lauda-ruolo
This would still be really nice of course. He would be a big help for Ferrari to grow very skilled and competitive drivers for the future. As Vettel was a really competitive one he would have a big influence on the young drivers from the academy.
But it would have been even better maybe if he was to be brought to a higher position in the team. I don't know maybe he would have been a good choice for even the team boss. He has such a big experience in Formula 1 with big teams like Ferrari and Red Bull. He has had many championships in his career as well. I just can't think of a better boss than him among the available ones truthfully. He doesn't have any experience for such job though but still. But I hope that Vasseur still will be a good choice for the team and they will be reborn from their ashes.