If it is a black hole then won’t the nearest planets get sucked into it?
But small black holes with the same mass as the Earth have the same sucking power as the Earth since it's the mass that does the sucking.
We'd all freeze to death in a few days, but the earth would go right on orbiting as if nothing happened.
If our moon turned into a black hole of its same mass tomorrow there would be even less of an effect. We'd notice we could no longer see the moon, but we'd still have tides just like before.