It's still important to note that black holes at the atomic level, and gravitational effects of any kind at that level in fact, are entirely speculative science

It's still important to note that black holes at the atomic level, and gravitational effects of any kind at that level in fact, are entirely speculative science. QM doesn't allow for any kind of gravitational attraction, and GR doesn't account for any of the effects observed at atomic level, so we are left with only speculation. Microscopic black holes are an entire extra level of speculation over any other gravitational effects. Even in GR, black holes are not exactly consistent with the theory - they are singularities, indicating that (even if we knew nothing of QM) GR can't be a complete theory of nature. So, discussing what microscopic black holes can or can't do is not much more than discussing what effect photon torpedoes would have on a Holtzman shield (Star Trek x Dune fanfic).