I use some rendercontrollers to make some code and template separation for some pages. The pages loads data from an external database and now I wonder if there any way to hijack the render of an blockgrid item?

I know I can just place the code in the razor template, but I want to have as little code as possible in the razor and load models with all needed data.

I tried to do it like I do for the page with a RenderController without success

public class FollowOrderBlockController : RenderController {
...
    public async Task<IActionResult> FollowOrderBlock(FollowOrderBlock model)
    {
        var myData = await myManager.GetTheData();
        model.MyData = myData;
        return View(model);
    }
}

On some other places I have "solved" this by making a component and call that from the block.

@(await Component.InvokeAsync("MyComponent"))

But on this block that's not an option

Is there a way to do this, or does this not get routed the same way?