Recent work on apparent fossils, discovered in 2017, in Quebec, Canada, seems to confirm the existence of life on Earth approximately 4 billion years ago. These relatively complex, branching-form fossils are very difficult to explain as anything but the remains of living things.
Given the age range of the strata under consideration, life could have already become fairly complex, as early as 300 million years after Earth formed.

This suggests that life began with relative ease on Earth, and by implication, that life could be very common throughout the cosmos.
Please find a link to an article with further details, below:

https://www.sciencealert.com/complex-life-may-have-started-on-earth-much-earlier-than-we-thought

If it can be proved that any form of life started that early on earth then it should be a slam dunk conclusion that life is all over the universe.

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Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.