The admission rate of transfer application is lower than that of freshmen. In addition to preparing some materials for freshmen, American universities will also attach great importance to the GPA scores of current schools in their transfer applications. The application level is actually the same as that of a freshman.
If you decide to go out, it is recommended to apply for a freshman directly. It is still possible to transfer in the United States, and it will definitely be easier than transferring from a domestic university to an American university.