People forget that the UK has ChatControl. It was made into law as part of the Online Safety Act 2023. It has not been enforced so far because it's not "technically feasible to do so" and because companies threatened to leave the UK with their services. You can be 100% certain it will suddenly become feasible if EU does the same.
> The Act also requires platforms, including end-to-end encrypted messengers, to scan for child pornography, which experts say is not possible to implement without undermining users' privacy.[6] The government has said it does not intend to enforce this provision of the Act until it becomes "technically feasible" to do so.[7] The Act also obliges technology platforms to introduce systems that will allow users to better filter out the harmful content they do not want to see.[8][9]