https://immortalityroad.wordpress.com/2023/08/02/the-bread-from-heaven-doing-his-will/

Christ said, “I have food to eat that you do not know about” (John 4:32 ESV). The disciples knew about earthly food. Therefore, Christ was speaking of a spiritual bread, a bread from heaven. So, we see that food = bread = manna. That food is the “hidden manna,” the invisible heavenly bread.