What possible physical evidence has been found to confirm hezekiah's reform?

To check Hezekiah’s reform, Isaiah, a spokesman for the Lord, conveyed the answer. He reassured him that Jerusalem would not collapse. In fact, he said that not one arrow would be shot into Jerusalem, nor would any blockade mound be built around it. He reiterated the prediction that Sennacherib would return home and be murdered. (2 kings 19:14-34; Is. 37:8-35)