You can lodge a Partner visa 820/801, based on either a de-facto relationship or being married, with limited evidence and keep adding new relationship evidence even after the application has been lodged, so when the Department of Home Affairs assesses your application, there will be a lot more evidence than at the lodgement stage.
The Department of Home Affairs will take into consideration whatever evidence you have provided in your application, before and after lodgement, at the time they assess your application. You can also lodge a partner visa based on a de-facto relationship without presenting your relationship registration certificate at the lodgement stage, but it is recommended to provide it as soon as possible.