You can look at the retraction itself [0] and it says nothing close to "it wasn't based in reality."
What it says is that Trump's actual words were that the state official would "find things that are gonna be unbelievable" and that "[w]hen the right answer comes out, you’ll be praised."
The specific words were a misquote, but there is no doubt from the call itself that Trump was pressuring state officials into supporting his big lie.
[0] https://www.washingtonpost.com/politics/correction-trump-geo...