With all the coherent radio transmissions eminating from earth, any half way sophisticated sensor at that range would detect that there is a technologically advanced civilization on earth.
The puny antennas on Voyager can pick up signals from nine billion miles. I am certain the earth fairly glows red hot in the radio frequency spectrum.
Look how quickly we switched to no longer using radio but going to streaming and cable.
In a couple of decades we might no longer be transmitting at all. And they will think we all died off.