The way some people talk about the PL as the biggest, strongest, fastest league in the world, you'd think that peasants were being picked up and thrown into the Colloseum. The level of hyperbole is unreal.
It's not even the most pressing league in Europe, so let's not worry about Onana shitting his pants at PL teams pressing him.
It's not even the tallest league in Europe (Netherlands, a place he's thrived in is), so let's not worry about Onana suddenly finding himself contesting duels with Goliaths.
And even if the league is more intense, it's not to the degree that people tend to exaggerate.
Year after year after year, PL unproven foreign players routinely hit the ground running for their respective teams without any real period of adjustment.
They're professional athletes, not semi-professional electricians.