These are the images of a butterfly (Luthrodes pandava). These were taken with Sony A7iii with Sony 90mm Macro lens with Raynox DCR-250attached. I have used external flash with diffuser. Hope you like these.
The 3rd is the best in my opinion, because of the more light. I suggest to try without the ryonox, I think it reduce details and with wider f maybe 9 or 10. The first one has nice colors and if it has more light in the front it will be perfect, maybe the angle of the flash need adjustment. Did you do the stacking in the camera or in the pc with helicon maybe?