I'm skeptical of that claim. I'm not even sure the Israelis would need refueling assets for this. According to the DoD source in the article, the ALBMs were fired from aircraft over the red sea. That's not far from Israel. Depending on the aircraft used and the exact loadout aerial refueling would probably be unnecessary. If it was necessary, Israel has aerial refueling assets of its own: they were able to conduct a strike campaign against Iran, which is much further away, without foreign tanker support.

It just doesn't make sense to me. This seems well within Israel's own capabilities. Why would they even ask another country for support? Just adds diplomatic complexities and increases the risk of the strike getting leaked.