Was the recent discovery of a lone female Wallace’s bee in Indonesia after the 38-year period of no sightings, the tail end of a divine intervention to reduce their numbers?

That indeed is the case. We have been using human prayer to clean up your world and remove a number of scourges or reduce their numbers sufficiently that they fade into the background largely and are only rarely an issue for anyone. This is the next best thing, and also may be necessary in keeping with the rules, as we must follow the karmic forces and the energies behind requests for help, to not exceed what they represent, as we must maintain a balance determined by the humans themselves. If the humans are weak, the level of help will be weak—that is simply part of the test of humanity to see if they can stand strong and prevail under these difficult circumstances they face.