The U.S. doesn’t require most Europeans to get a visa to come here. They do, however, have to register online in advance and get an approved “ESTA.” Which is like an electronic visa! It’s just that the process we put people through to get something we actually call a visa is much, much worse.
Europe is responding in kind and creating their own online registration system that residents of much of the world will have to use before being allowed to enter. It’s called ETIAS, for the European Travel Information and Authorization System.