Ocasio-Cortez took to Instagram after the Department of Homeland Security suggested they may pursue arrests of three Democratic lawmakers who partook in a protest outside of an ICE facility in Newark, New Jersey. Reps. Bonnie Watson Coleman (D-NJ), Rob Menendez (D-NJ) and LaMonica McIver (D-NJ) all attended the protest.
I have no idea but whether they did or not is irrelevant.
Protesting is constitutionally protected speech even for lawmakers, and has no bearing on their rights as elected officials to tour those facilities.