We're entering an era of "tech nationalism". China has been completely vindicated for esssentially not allowing their country and economy to be held hostage to foreign tech companies. It would be an era of "tech colonialism". Look into the century of humiliation, gunboat diplomacy, the opium wars, etc and see why China might not be on board for that.
Europe collectively is a US vassal state, not just in tech. As an example, if someone in Switzerland Venmos someone in the Netherland with a description of "Cuba" or even "Cuban" (sandwich), the payment could be delayed or you could be banned entirely [1]. Why should a payment between two Europeans in Europe be entangled with US sanctions?
The danger here for European "tech emancipation" is that the US government will get involved and fight the fights for US companies. The United Fruit Company was the poster child for this where the US deposed the Guatemalan government in 1954 and the 60+ years of Cuban sanctions are basically because the UFC was cheating on Cuban taxes.
Brazil's Pix (IMHO) will come under the pressure of this on behalf of Visa/Mastercard that may include trade retaliation and other forms of pressure and the US government will argue that Pix is "illegally" subsidized by the government. Europe's payment systems will face the same attacks.
[1]: https://www.buzzfeednews.com/article/matthewzeitlin/be-caref...