Pass InputParams from CustomPage to PCF Control

Question

I created a custom page and also a modern command. This command gets the ID of the current entity or (if you are on a subgrid) the entity ID of the selected entity.

Now I'm passing the ID from my command to the custom page via:

const pageInput = {
            pageType: "custom",
            name: "we_technicaladdresssearchpage_5b4f6",
            entityName: OpportunityProduct.name,
            recordId: opportunityproductId,
        } as any;

        var navigationOptions = {
            target: 2,
            position: 1,
            width: { value: 90, unit: "%" }
        } as any;
Xrm.Navigation.navigateTo(pageInput, navigationOptions);

On the custom page im saving it into a variable:

Set(inputParameters;JSON(Param("recordId")))

The question is now: How can I access this input parameter from a pcf-control embedded on this custom page? Additional: Is it possible to pass a whole object? So I could load the entity already and pass it as a whole object to the custom page and then to the PCF?