As I understand it, SCOTUS temporarily allowed the admin to continue cutting wire while the case continues litigation in lower courts. Technically Texas can keep building and has Constitutional authority to block federal workers from accessing the wire. I do not know what precisely is happening on the ground.
Arrests would certainly step things up a bit! I'm certainly in favor of cold lawfare over hot warfare.
As I see it, even if TX keeps putting up wire and the feds keep cutting wires, the presence of all those blockaids and NG troops is probably enough to deter most from crossing there. Which is good. And I don't think there is any order against TX detaining migrants and sending them back if they do cross there. Could be wrong.