Adding New Checkout Step on Nop 4.2

Hello,
Im trying to add a new Checkout Step on the NopCommerce One Page Checkout.
I created new CSHTML and Model for my New Checkout Point. I also did created in the Checkout Controller a new Methode. I changed the Code for the Shipping Step(OpcSaveShippingMethod) so it calls my new Methode. This Methodes links via update section to my new CSHTML File. I set a break point in the New CSHTML, this Point gets reached, but the Website does not change it is still in the Shipping Method Step.
Does somebody knows what i have to Change to get to my new Checkout Step?

do you check public.onepagecheckout.js code?

I did check the js File.
So i copied the shipping Funtion and changed some variables to the Name of my New Method.
I probaly have changed something wrong or not enough.
Here is the Pastebin:
https://pastebin.com/yLa7vJ4i