Use wildcard domain with worker (assets)

[last imp]

I'm trying to make subdomains work with a wildcard.
Because worker domains do not support wildcards, I'm just doing it with a DNS entry.
This did not work with assets (CORS error) so I added a route rule that adds access-control-allow-origin: * to the response headers.
Now, when I go to the subdomain, the assets are loaded but any other request to the domain still return http 522 responses.
The domain without the wildcard works just fine.

What am I supposed to do to make subdomains work?
The project I'm trying to deploy is a nuxt project.

I have two worker domains:

• mydomain.com
• fallback.mydomain.com (trying out the saas custom domains)

and one route:

• *.mydomain.com

the two worker domains work completely fine.
the route loads the assets but any other request fails with 522

[last imp]

Ok, I had to change the route to *.mydomain.com/*