So you commit an offence under part 91 if you fly with an uncertified required instrument. And it's 50 penalty units. , and it says nothing about being only applicable to IFR, despite the commentary.
What now concerns me is if the installation is also required to be approved.
You worry too much, there are an awful lot of experimental aircraft in front of you with non certified gear, would take a 100 years for casa to get to you, even if they were interested.