I need help, Golang Bluesky: I'm trying to understand the new-ish errors.Is(...) API: Why does checking NewError() against &MyError{} pass but doesn't w/ a sentinel value of type *MyError?

Go playground: https://go.dev/play/p/sErPx877Xty

Why does the App Store keeps showing me an ad as huge as this, for weeks, for an app *that I already have installed????* smh