The european far right are hardly fans of large American tech companies
now, if they were domestic, that would be entirely different
Those parties are running predominantly on nationalism and populism. If anything they will be happy to screw US tech companies even more.
No law like the DMA passes without the approval of parliament and the council of member states. In fact, all the details are hashed out between these two bodies with little to no say from the commission.
BTW: The way the commission is selected is one step removed from the voters but this principle is not too uncommon in European parliamentary democracies. For example the German or Austrian Chancellors or the prime ministers of Italy ,Spain, Sweden, Denmark, Poland are elected in a similar fashion.
Do they have a much more favorable attitude towards American tech giants than whoever is in power now?
Right, Far-right and EU-sceptic parties are predicted to become much stronger.
So their stance might change on some topics