You managed to contain and show the spectral highlights in what appears to be harsh light.
Yes, direct morning (low angle) sun. That's one of the limitations of shooting close-ups of flowers outdoors, especially with a long lens: you need a lot of light. A small aperture (f/11 in this case) is required to provide adequate depth-of-field because focus stacking isn't feasible if the scene isn't static, and you always have some subject motion to contend with—even in a light breeze. I wasn't overly concerned about camera motion, even though I was shooting hand-held, because the combination of the sensor-based stabilization in the Fuji X-T4 body and the optical stabilization of the 70-300mm lens makes for a remarkably steady platform, but I still needed a shutter speed fast enough (1/140s) to deal with the movement of the flower in the wind. On the other hand, the sunlight illumination was an important factor in bringing out the colors in the flower bud, which is what drew my eye to it in the first place.