In case a gatekeeper does not comply with the obligations laid out in the DMA, the Commission can impose fines up to 10% of the company's total worldwide turnover, which can go up to 20% in case of repeated infringement. In case of systematic infringements, the Commission is also empowered to adopt additional remedies such as obliging a gatekeeper to sell a business or parts of it, or banning the gatekeeper from acquiring additional services related to the systemic non-compliance.
If you exclude neighboring countries Zurich has a foreign born population share of 27% (compared to 18% of Los Angeles). If you only look at the last 10 years Zurich has foreign born non neighboring immigration of 10% (compared to 4% for Los Angeles).
If you only look at intercontinental migration then Los Angeles wins with 14% (compared to 8% of Zurich).
So yes Zurich is less cosmopolitan then LA, but most of it is just because the US has more diverse neighbors.