googled your wasp and found there are multiple species but could find no better description to narrow it to yours. One thought I had is since the life cycle is quick and if there are aphids present then in less than two weeks you should see the emergence of a new batch. Might need a magnifying glass to help you see them better. Same for the wasp. Most all cameras have a macro setting but the challenge is holding it still enough to not have the subject blur. I always use a tripod for macro photography. Not easy to catch fast moving targets though.
Wish I could offer more but that's all I have for now. Keep watching and see if you get any new info we can use to ID your " good wasp" Happy Growing David