I work at a bigtech company, and, depending on how you look at it, either everyone in a technologist role has prod access or nobody does. You have to get peer approval to access your team's sliver of prod, and some team's take this very seriously, while others act as rubber stamps for each other.
Wait wait hang on… I’m confused. I was with you on the “everyone has prod access” but then you went and qualified it with teams owning slivers of something or other. That doesn’t sound like full access to production. I bet they didn’t even have cloud console admin.
Each team that owns a service has access to the prod environment(s) for said service (including the cloud console, a shell on a prod machine with admin privileges, etc) provided they get peer approval for the access they need.