When configuring a redirect there is no check if the redirect is valid to the tenant in which the redirect is configured.
I would like to have a double check/quality gate that when a redirect does not "show" to its Tenant-Domain that there is a hint like "the redirected URL is not equal to the tenant domain. Are you sure you want to add it?"
Yesterday I had the issue that I did a copy-paste mistake and configured a redirect to another language shop. Tenant was SiehAnCH and I configured a redirect to SiehAnAT (I havent recognized it).
I would not hardly "disallow" it because some URLs can be redirected to external Websites such as company/HR websites, Instagram Profiles, etc.