How to enable Plugins in microsoft copilot studio. maybe a preview error

Hi all,

I am struggling to get access to the vast connector library in Microsoft Copilot Studio. I have access through Power Apps on the same environment, but am limited to excel, weather and power automate flows. Can someone please offer some suggestions?

I have tried to use power automate, however it only takes one string through copilot studio, so I was planning to send a JSON string and then parse it over in power automate, however I am having struggling creating a JSON string with my variables. If someone has any experience with this, could you please post example documentation of how it should be formatted. I am currently trying to use the power fx command but I am not able to insert my variables (saved as strings) in (not sure if I'm just hopeless or it isn't supported). Have been struggling on this for hours, would really appreciate some help. Thank you