Chrome uses the chromium engine as well. Opera should get at least support the features that Chrome does in their policy support. All they would have to do is read the correct keys from the registry and apply whatever is applicable.
i need to use the function from chrome "ExtensionInstallForcelist" for Opera for my extension
https://chrome.google.com/webstore/detail/stop-it/mgbmndipjhghcencokiedbkfgbomdpmd?hl=en