Hello Dr. J, thanks for writing.
Everything the Bible says about Heaven includes a physical dimension. We will eat and drink with God in the Kingdom. The elders will fall down before God’s Throne and lay their crowns at His feet. And so on and so on.
Every description of Heaven includes a physical description.
It is never described as an ethereal, spiritual plane with no physical aspect to it. Rather, Isaiah can be whisked into God’s presence in Isaiah 6, and interact physically. Physical coals are taken from an altar and touch — physically — Isaiah’s lips, atoning for the sins of his unclean mouth.