How was protein synthesized from amino acids in the prebiotic world?

Thank you for taking the time to give me a serious answer. But please take a look at the questions I am asking. I am not asking about what we some people think that might have happened. I am asking about current observations on Earth. Where on Earth can we observe the things I ask regarding protein in my first post?
You cannot. the environment has changed. The current terrestrial environment(s) are not compatible with the processes that took place billions of years ago