All major platforms have mechanisms to identify ban evasion. It's not so easy to create another account when, for example, they ask for a phone number.
In the U.S. at least, it is trivial to buy a new SIM anonymously. But really, you should refuse to use any platform that requires a phone number in the first place. These companies make it implicitly very clear that they want to control you and extract every bit of information that they can from you.
