Test photos with a Tokina manual focus 400mm f/8 reflex lens. (also called a mirror lens). In my garden on 13 July 2021. Nikon Z7 II, SB900 flash with Harbor Digital flash extender and a Fotopro gimbal head used L bracket mode.
Those are very nice apart from the butterfly, which has an ugly out of focus background. That is my opinion of course. I find these lenses produce a too busy background, which you avoided in the first four photos. I imagine this lens would be good for birds in flight against the sky, assuming enough light of course. Interesting to see the bee close up.