No he didn’t he say that and he isn’t backtracking - it went like this:
Berkeley then asks, “They weren’t actually under a willow tree, but they were lying outside in a meadow, weren’t they—Harry and Meghan? When you took the photograph of them?”
Harriman answers the question indirectly, saying, “They were lost in their love at home in their garden, comfortable, celebrating new joy, new life, with fortitude of hoping for light in life, after such loss that they went through with a miscarriage. So it really was a particularly joyous image to celebrate life itself.”
His explanation is that he is often asked leading questions re H&M and he swerves them.
https://www.harpersbazaar.com/celebrity/latest/a60188960/misan-harriman-responds-allegations-edit-prince-harry-meghan-markle-photo/