Hey, @samishacouture-9932! Did you take a look at the guide we shared above? 
This isn’t a domain, DNS, SSL issue or with the BOM1 routing AFAIK. From the guide:
It’s a good idea to check the deployment URL for typos or incorrect paths. This is especially true when accessing specific deployments using Generated URLs which contain a unique hash.
You should review the deployment list from your project dashboard to make sure that (1) the deployment was successful, (2) the deployment was not deleted, and (3) the URL you’re visiting is the correct one for that deployment.
If the deployment exists, review the deployment logs for issues that might have caused the deployment to be unavailable. If there are uncaught errors in a function or component, those could bubble up and cause you to see a 404 error. In this case a try/catch statement can help.
If the deployment exists, can you make sure your domain is pointing to the right one?