An industrial and expansionary civilisation which came into existence anywhere in the Milky Way 10 Mya, and whose interstellar travel was limited to 0.01c, would’ve colonised Earth while we were still in the process of losing our body fur and interbreeding with Neanderthals.

This is fairly recent compared to the age of the universe, and the speeds can be achieved with know (albeit expensive) human technology.

If the aliens had self replicating probes (of the robotic kind, not the organics-in-factories kind), the known rules of physics suggest that a Dyson swarm can be built in less than a century, at which point (0) now you have to ask why there are stars to see, and (1) 0.9c is easy, as is going intergalactic, so such a civilisation can’t have been that recent in half the Council of Giants either.

That we can see stars and that we exist, says that expanding industrial intelligences like us, either never got to this stage, or are filtered in what currently looks like a small gap between here and there.

Misaligned AGI that doesn’t want to expand could be one, so could in-fighting necessarily becoming too easy at the same time as any tech for interstellar expansion.

Personally, I think there’s dozens to hundreds of small-ish (think factors of 0.95-0.10) filters, some ahead, some behind.