Beautiful pictures and lovely tomatoes.
I think in your first grouping of pictures, I don't think that is a fly but rather an orchid / mason / green (or blue) metallic bees. They are smaller than a honey bee, don't sting people, and make about 1000 hits per day. I had many this fall (summer temperatures) pollinating my tomato plants where the night time low temperatures were way too hot for normal pollination.
https://www.growveg.com/beneficial-i...ada/mason-bee/