By default, when a user in the global domain views a table containing a sys_overrides column (like Business Rules table records), the user sees records from only the global domain.
This is because system property "glide.sys.restrict_global_domain_processes" is true by default.
From 'global' domain, this property restricts the processes that will be applied to just 'global' domain. When turned OFF, we apply processes from all the domains, if the user's session is currently in 'global' domain.
1. User has to click "Expand Domain Scope" related link to expand visibility to other domains, when in global domain
2. System property "glide.sys.restrict_global_domain_processes" can be changed to false, but has to be reviewed in sub-production as that is a system level change and should be thoroughly tested, if suitable to your requirements.
For more information: Change domain visibility