The European Council nominates the future Commission President with a qualified majority, this is clear, formally there shouldn’t be too many roadblocks to nominate her as future Commission President before she gets put up to the vote of the European Parliament, when the EPP, S&D and ALDE have a qualified majority among EU’s head of states/governments (as they do).
Each country gets one commissioner, Germany as it does currently would be losing out on holding a “normal” commissioner as vdL is from Germany.
Germany is currently governed by a coalition of SPD, Grüne and FDP (so an SD/Greens/ALDE coaliton), seen from a domestic German politics POV…I doubt Scholz will be thrilled to support vdL in the European Council as vdL belongs to the CDU, which is the fiercest competitor of the SPD for head of regional governments in most states and most probably also for the chancellorship after the German federal election in 2025. VdL became Commission President, when Germany was still governed by CDU/CSU/SPD (EPP/SD coalition).
Obviously Germany can easily be overruled in the European Council, if they won’t give vdL its support, but is this actually politically feasible to nominate someone whose own country doesn’t stand behind, while also losing out on having a “normal” commisioner on its own?