What’s happening here is that Migration Assistant has migrated all my apps, and has automatically launched any of them that are listed in Login Items or are set to automatically launch in the background. They all launch, all at once, and every single one of them then prompts me for permission to do all the things they already had permission to do on my previous Mac.
In this screen shot, I’ve dragged them apart, but in reality most of these windows appeared on top of each other. They float above every other window, and most of them want to open various portions of the Settings app. In the background, a few apps have launched with their own alert prompts, requesting that I perform more tasks in order to get the system ready.
You will be protected.