Stopping weapons smuggling is a futile task, really.
Sure, one could stop huge scale, open, shipping, but smuggling? No way.
It’s futile, at best.
The solution is to either change the rules of the game (e.g., give up) , or destroy those that demand the product (kill them or break their will such that they don’t want the product).
Solution: 100 yard strip from Israel proper to the Mediteranean, ground penetrating radar / oil finding equipment (will find tunnels), drills, explosives.
That solves the smuggling problem on the southern border.
Next?