Adam and Eve must have been in danger if the lion was approaching or even just caught sight of them. And to try and sit by the mane lions and stroke, as depicted in many pictures, it would mean quite an easy dinner for the big cats.
Problems in the Garden of Eden though, at least for a hungry lion, is that no deaths could occur, because the lion will be able to kill either Adam or Eve. The lion will have an appetite for human flesh fixed or indeed for any meat. You can visit https://amazingbibletimeline.com/timeline_online/ to get more information about bible history.
All animals, including lions, were herbivores. Even the Bible says that the lion ate straw. In the absence of death, all human beings will live in harmony so that if Adam and Eve sit down with the lion is not the point. The Bible states that the lambs were safe to lie beside the lions and so surely, she could be brushed mane of a lion if it wanted to.
Image Source: Google
The model of the evolution of the secular view of our origins cites a gradual change in the structure of the tooth to the lions, but the majority will reject the explanation that circulated highlighting the fact that predatory cats initially had more suitable teeth for grinding plants than anything else.
We find the difference between evolution and the biblical accounts is that on one hand evolution will detail improvements made within a species, such as lions are capable of killing prey more efficiently over has grown but the Bible, on the other hand, would say the direct opposite.
While the lion may not fuss about making friendships with humans, has been known to occur. Remember that the Bible teaches evolution in reverse so that the lion has become dim, as have humans.