Okta Branding using the same Domain for app as well as okta domain

We are planning to use branding and have our app hosting on the Domain
atxxx.dev.company.com
Navigating to the page we see the login page and able to see the email customised templates working.

Now we want to keep the same domain for our app as well, basically saying atxxx.dev.company.com/home
to navigate to our site with the tokens after sucessfull login. Is this the correct way of using the branding , is this flow possible or would it result in 429 ? What could be the possible approach if we want to keep the same domain for both Login and the App while also using the branding ?