Firebase domain .firebaseapp.com works while .web.app does not

Question

After successful deploy, only one domain (projectname).firebaseapp.com works.
The (projectname).web.app shows Firebase message "Site Not Found - Why am I seeing this? ..."
The index.html does not have any Firebase App setup

.

The Firebase console>hosting>dashboard shows two domains as default and no status:

(projectname) domains

Domain	Status
(projectname).web.app Default
(projectname).firebaseapp.com Default

How to make the shorter domain .web.app work?

Does Firebase allow only one domain?
If above is the case, how to select the domain?
How to remove .firebaseapp.com while keeping .web.app
Why two domains are listed as default ?

Answer 1

Both names should work and serve exactly the same content.

It could be that something internally went wrong during the deploy, so trying running firebase deploy again to rule that out.

If the problem persists, reach out to Firebase support for personalized help in troubleshooting.