The answer is simple - the universe is too young and dangerous for any civilization to survive long enough and close enough to be even detected.
E.g., say we are the first. Not only is it a question of how long would it take to achieve interstellar travel, but how long until we are obliterated by either volcanism or meteor strikes.
The speed of light problem is real. If we survive 10000 more years, that’s only a spherical radius of 10000 light years for us to be detected.
Someone else would have to be that close and able to detect us. Signals we generate would be weak anyway, which’d reduce the distance. Even if that were the case, by the time they’d get here, we’d already be gone...
>> If we survive 10000 more years, that’s only a spherical radius of 10000 light years for us to be detected.<<
Well, that’s the requirement for the civilization to be detected while it is still present. But the civilization could still be detected long after it’s gone.
Frankly, I would argue that once a civilization achieves independent colonies, it’ll be virtually impossible to destroy.