First, a definition…
Biology-online.org defines an invasive species as a “Non-native species disrupting and replacing native species.
Black soldier flies are thought to have originated in the southeastern United states. If so, then they are non-natives, at least in other countries, but are they disrupting and replacing other species? Are BSF in Washington state or Connecticut non-native?
I don’t claim to be an authority on insects, but I have a few thoughts about the subject which I posted on the forum: LINK