Ultimately we don’t know. We have not been looking far or long. SETI BTW is kind of a joke. The only way we would hear anything is if someone was very close or

Ultimately we don’t know. We have not been looking far or long. SETI BTW is kind of a joke. The only way we would hear anything is if someone was very close or was intentionally blasting a signal at us at incredible transmit power (like terawatts or more). Radio signals fade pretty quickly.