Could it be an alien drone though? Yes.
If it was it means it came here either by a lightsail, or some other sub-lightspeed travel technology. Or it was dropped through blackwhole or something and it just showed up.
If it teleported here, then it probably has next level quantum tech and whatever. It could've teleported back a signal, taken over all communications and they would have already physically taken over our planet. So that's not likely the case, unless the drone is just capable of surviving faster than light travel but is still limited by the same physical problems in integrated circuits and power generations that we already know.
Okay.Now, if it traveled at sub-lightspeed it's likely to have taken at least a few thousand light years at minimum ( given by our observation of what planets are close to us ) to get here. More likely a few hundred thousand. That means another few hundred thousand to send a signal back. In that case that they would try to colonize us before we get too powerful, by sending a colony ship or something, which would take even more time. We're likely to go extinct on our own before that happens so there's no point worrying about aliens. This is assuming that they've reached the same physical limits in technology that we have. Those being the speed of travel limit, and quantum computing not being Turing complete. Meaning this drone can not break cryptography, or run an overpowering AI that takes over all our communications and controls us.