Is a sport for them
The wall construction stopped soon after he was out of office. There is another wave of migrants waiting for the Trump era Title 42 expries... Kind of like horses on a gate, waiting for the doors to open.
Anyway, the INS, Border Patrol, and the other agencies cannot do much. They have a catch an release policy. They get dropped in a Sanctuary City and they are given a Court Date. They never show up for court, nothing is done. Also, Chinese nationals cross the border by buses from Canada. Those bastards are setting up Fentanol facilities in Mexico and Canada, and they are pushing the junk into the US.
If you want to come over, fly to Mexico or Canada, and walk over, nobody is checking. If you fly over, that is another ball game.
Perhaps Trump was right, he said that Mexico will build/finish the wall and pay for it. When those Vatos find out the mess they got into, Mexico will not want any of them back; neither the Yanks fleeing the US.