The EU has basically said that it's better to have a handful medium-sized companies in competition for customers than one or two mega-corps owning and dictating the market. And to resolve that they employ two things, one is the DMA/DSA and similar laws which mostly takes effect when your company reaches a certain large market penetration, the other is standardisations such as the Radio Equipment Directive (think "USB-C law" and similar ones) that make it easier for consumers to avoid vendor lock-in.
> just make European goods more expensive and cause Europeans to buy from Temu instead
> just make European goods more expensive and cause Europeans to buy from Temu instead
Temu is under active investigation for breaching these laws, anyone operating within EU is subject to those laws, not just European companies (e.g. https://digital-strategy.ec.europa.eu/en/news/commission-ope...)