Company from Taiwan and Japan won't deal with Hezbollah directly, as that circumventing the US and EU sanction, they are going to face heavy fine and loss of contract if they deal with Hezbollah direct.
Which mean any deal is done to and from Hezbollah would have to go thru 2 or 3 or more layer of intermediary, which is one or more of these intermediaries is infiltrated by the IDF in a similar fashion to how FBI flip darkweb.
Once they turn one of the intermediary, then you can flip the entire supply chain.