You can 2FA on twitter with the Authenticator app. There is no indication that OP was using SMS 2FA, and you would suspect that they would have mentioned that t

You can 2FA on twitter with the Authenticator app. There is no indication that OP was using SMS 2FA, and you would suspect that they would have mentioned that their phone stopped working if in fact they were sim swapped. I agree there is no proof it was an inside job but it seems plausible.