Trying to install test app to test store but doesn't generate a code in the url

[Hellogark]

I'm trying to create a test app and i want to handle orders and clients info with my API for testing, but when i click install app i get redirected to my "Redirect URL" insted of my App URL

So in my Redirect url i get the hmac, host, shop and timestamp but i have no code parameter, do i have to make another redirection url or how does this works? Because it seems that private apps works different than public apps

If i try to install the app via
[myurl...]?
hmac=053429b920e915f55074bae447c18a24a96fcbd406ae90bbd7c9f4759d53cee4&host=YDwBAW4uc2hvcGlmeS5jb20vc3RvcmUva29yZGF0YXBydWViYQ&shop=myshoptest.myshopify.com&timestamp=1712875406