Dynamic Application Registration endpoint listed but returns 404

I’m trying to setup FastMCP remote server working with Auth0 Dynamic Application Registration

My tenant is listing a register endpoint and I’ve enabled Dynamic Application Registration (checked via Management API)

“enable_dynamic_client_registration”:true

This looks good - I can see /oidc/register endpoint

https://<AUTH0_TENANT_DOMAIN>/.well-known/oauth-authorization-server

but

https://<AUTH0_TENANT_DOMAIN>/oidc/register

returns

{
“statusCode”: 404,
“error”: “Not Found”,
“message”: “Not Found”
}

Any advice?

I’m assuming this is an available feature on Free