[no_wizard]

When you say very little, do you mean none, or there is some questionable evidence?

I'm genuinely curious

[dudinax]

Before "modern" life evolved in the pre-cambrian era, there was the Ediacaran life forms that were complex multicellular life, but died out millions of years before the Cambrian explosion.

https://en.wikipedia.org/wiki/Ediacaran_biota