When Kuiil asks about what happened against the Rhino, the Mandalorian says he has no idea. I like the idea that the Force isn’t known everywhere. Did he also not realize the baby was helping him?
On a backwater world with little to no contact with the greater galaxy sure. But the Jedi were guardians of the Republic for over a thousand generations. The Mandalorians themselves have clashed with the Jedi a number of times in their history.
I think he knows it was the baby, he’s just having a hard time coming to grips with just how powerful the infant apparently is.