The Labor and Welfare Administration (NAV) of the Norwegian government is doing exactly that, we have been opening up our code since 2018 and are accepting pull requests across our 2000 public repositories from those who want to improve government services https://github.com/navikt this has also enabled a much more close collaboration between new and existing partners that was previously unheard of!
EvanDotPro|2 years ago
Kovah|2 years ago
Only somewhat positive example from the recent past is the Corona warning app: https://github.com/corona-warn-app